feat: track limit budgets in a usage ledger and surface them in a Usage section

- RuleUsage + UsageLedger: per-rule, per-day minutes/opens in app-group
  defaults (monotonic minutes, incrementing opens, midnight rollover by
  day-keying); MockUsageLedger for tests and seeded UI scenarios
- usage-aware status: a limit rule whose daily budget is spent on an
  enabled day is active (blocking) until next midnight; Hard Mode gating
  and app-list locking honor it; soft unblock pauses until midnight
- RuleEnforcer shields spent limit rules (always Block mode) while the
  app runs
- new Usage section under Blocked Apps: '18m of 45m used today · 27m
  left', '2 of 5 opens today · 3 opens left', 'Blocked until tomorrow'
- new 'limits' seed scenario + UI tests

OpenAppLock/Logic/RulePolicy.swift

@@ -8,46 +8,55 @@ import Foundation
 /// Gates every mutation of a rule. This is where Hard Mode is enforced:
 /// while a hard-mode rule is actively blocking, nothing about it can be
 /// weakened until the window ends.
+///
+/// Limit rules block on spent usage rather than the clock, so their gates
+/// take the day's `RuleUsage`; passing nil treats them as not blocking.
 enum RulePolicy {
     /// True while the rule is actively blocking with Hard Mode on.
     static func isHardLocked(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        rule.hardMode && rule.status(at: now, calendar: calendar).isActive
+        rule.hardMode && rule.status(at: now, calendar: calendar, usage: usage).isActive
     }
 
     static func canEdit(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        !isHardLocked(rule, at: now, calendar: calendar)
+        !isHardLocked(rule, usage: usage, at: now, calendar: calendar)
     }
 
     static func canDisable(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        !isHardLocked(rule, at: now, calendar: calendar)
+        !isHardLocked(rule, usage: usage, at: now, calendar: calendar)
     }
 
     static func canDelete(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        !isHardLocked(rule, at: now, calendar: calendar)
+        !isHardLocked(rule, usage: usage, at: now, calendar: calendar)
     }
 
     /// Whether the user may lift the current block early ("Unblock").
-    /// Requires an active window and Hard Mode off.
+    /// Requires an active block and Hard Mode off.
     static func canUnblock(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        rule.status(at: now, calendar: calendar).isActive && !rule.hardMode
+        rule.status(at: now, calendar: calendar, usage: usage).isActive && !rule.hardMode
     }
 
     /// Hard Mode can always be turned on, but never off while the rule is
     /// actively blocking — that is the whole point of a hard block.
     static func canTurnOffHardMode(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        !isHardLocked(rule, at: now, calendar: calendar)
+        !isHardLocked(rule, usage: usage, at: now, calendar: calendar)
     }
 
     /// App lists feed active shields, so while any hard-mode rule is actively
@@ -55,21 +64,32 @@ enum RulePolicy {
     /// back door out of the hard block. Creating new lists and picking lists
     /// for other rules stay allowed; they cannot weaken an active block.
     static func canEditAppLists(
-        rules: [BlockingRule], at now: Date = .now, calendar: Calendar = .current
+        rules: [BlockingRule], usageFor: (BlockingRule) -> RuleUsage? = { _ in nil },
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        !rules.contains { isHardLocked($0, at: now, calendar: calendar) }
+        !rules.contains {
+            isHardLocked($0, usage: usageFor($0), at: now, calendar: calendar)
+        }
     }
 
-    /// Pauses the rule's current window. Returns false (and changes nothing)
+    /// Pauses the rule's current block. Returns false (and changes nothing)
-    /// when unblocking is not allowed.
+    /// when unblocking is not allowed. Schedule rules re-arm at their next
+    /// window; limit rules re-arm at midnight with the next day's budget.
     @discardableResult
     static func unblock(
-        _ rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+        _ rule: BlockingRule, usage: RuleUsage? = nil,
+        at now: Date = .now, calendar: Calendar = .current
     ) -> Bool {
-        guard canUnblock(rule, at: now, calendar: calendar),
+        guard canUnblock(rule, usage: usage, at: now, calendar: calendar) else { return false }
-              let window = rule.schedule.activeWindow(containing: now, calendar: calendar)
+        switch rule.kind {
+        case .schedule:
+            guard let window = rule.schedule.activeWindow(containing: now, calendar: calendar)
             else { return false }
             rule.pausedUntil = window.end
+        case .timeLimit, .openLimit:
+            guard let midnight = calendar.nextMidnight(after: now) else { return false }
+            rule.pausedUntil = midnight
+        }
         return true
     }
 }

OpenAppLock/Logic/RuleStatus.swift

@@ -45,14 +45,25 @@ enum RuleStatus: Equatable, Sendable {
 }
 
 extension BlockingRule {
-    /// Live status of this rule. Schedule rules derive it from their time window;
+    /// Live status of this rule. Schedule rules derive it from their time
-    /// time/open-limit rules report upcoming based on their enabled days only
+    /// window. Time/open-limit rules derive it from the day's usage: once the
-    /// (their blocking is triggered by usage, not the clock).
+    /// budget is spent on an enabled day they are active (blocking) until the
-    func status(at now: Date = .now, calendar: Calendar = .current) -> RuleStatus {
+    /// next midnight; without usage data they report upcoming.
+    func status(
+        at now: Date = .now, calendar: Calendar = .current, usage: RuleUsage? = nil
+    ) -> RuleStatus {
         guard isEnabled else { return .disabled }
         guard !days.isEmpty else { return .dormant }
 
         guard kind == .schedule else {
+            if let usage, isScheduledToday(at: now, calendar: calendar),
+               limitReached(given: usage),
+               let midnight = calendar.nextMidnight(after: now) {
+                if let pausedUntil, pausedUntil > now {
+                    return .paused(until: min(pausedUntil, midnight))
+                }
+                return .active(until: midnight)
+            }
             guard let next = schedule.nextStart(after: now, calendar: calendar) else {
                 return .dormant
             }
@@ -70,4 +81,30 @@ extension BlockingRule {
         }
         return .dormant
     }
+
+    /// Whether the rule's enabled days include the day containing `now`.
+    func isScheduledToday(at now: Date, calendar: Calendar = .current) -> Bool {
+        guard let weekday = Weekday(rawValue: calendar.component(.weekday, from: now)) else {
+            return false
+        }
+        return days.contains(weekday)
+    }
+
+    /// Whether the given usage exhausts this rule's daily budget.
+    /// Always false for schedule rules — they block by the clock.
+    func limitReached(given usage: RuleUsage) -> Bool {
+        switch kind {
+        case .schedule: false
+        case .timeLimit: usage.minutesUsed >= dailyLimitMinutes
+        case .openLimit: usage.opensUsed >= maxOpens
+        }
+    }
+}
+
+extension Calendar {
+    /// The first instant of the day after the one containing `date` — the
+    /// "Tomorrow" reset point for spent limit budgets.
+    func nextMidnight(after date: Date) -> Date? {
+        self.date(byAdding: .day, value: 1, to: startOfDay(for: date))
+    }
 }

OpenAppLock/Logic/UsageDisplay.swift

@@ -0,0 +1,40 @@
+//
+//  UsageDisplay.swift
+//  OpenAppLock
+//
+
+import Foundation
+
+/// Strings for the home screen's Usage section. Used values clamp to the
+/// budget so overshoot (thresholds can fire late) never reads "50m of 45m".
+enum UsageDisplay {
+    /// "18m of 45m used today" / "2 of 5 opens today".
+    static func subtitle(for rule: BlockingRule, usage: RuleUsage) -> String {
+        switch rule.kind {
+        case .schedule:
+            ""
+        case .timeLimit:
+            "\(min(usage.minutesUsed, rule.dailyLimitMinutes))m of "
+                + "\(rule.dailyLimitMinutes)m used today"
+        case .openLimit:
+            "\(min(usage.opensUsed, rule.maxOpens)) of \(rule.maxOpens) opens today"
+        }
+    }
+
+    /// "27m left" / "3 opens left", or the blocked/unblocked state once the
+    /// budget is spent.
+    static func remainingLabel(for rule: BlockingRule, usage: RuleUsage, isPaused: Bool) -> String {
+        guard !rule.limitReached(given: usage) else {
+            return isPaused ? "Unblocked until tomorrow" : "Blocked until tomorrow"
+        }
+        switch rule.kind {
+        case .schedule:
+            return ""
+        case .timeLimit:
+            return "\(rule.dailyLimitMinutes - usage.minutesUsed)m left"
+        case .openLimit:
+            let remaining = rule.maxOpens - usage.opensUsed
+            return remaining == 1 ? "1 open left" : "\(remaining) opens left"
+        }
+    }
+}

OpenAppLock/OpenAppLockApp.swift

@@ -31,8 +31,12 @@ struct OpenAppLockApp: App {
             fatalError("Could not create ModelContainer: \(error)")
         }
 
+        let usageLedger: UsageReading = config.isUITesting ? MockUsageLedger() : UsageLedger()
+
         if let scenario = config.seedScenario {
-            SampleRules.seed(scenario, into: container.mainContext)
+            SampleRules.seed(
+                scenario, into: container.mainContext, usage: usageLedger as? MockUsageLedger
+            )
         }
         AppListMigration.run(in: container.mainContext)
 
@@ -46,7 +50,7 @@ struct OpenAppLockApp: App {
 
         let shields: ShieldApplying =
             config.isUITesting ? MockShieldController() : ManagedSettingsShieldController()
-        _enforcer = State(initialValue: RuleEnforcer(shields: shields))
+        _enforcer = State(initialValue: RuleEnforcer(shields: shields, usage: usageLedger))
     }
 
     var body: some Scene {

OpenAppLock/Services/AppGroup.swift

@@ -0,0 +1,19 @@
+//
+//  AppGroup.swift
+//  OpenAppLock
+//
+
+import Foundation
+
+/// The app group shared by the app and its Screen Time extensions. Usage
+/// tracking and rule snapshots live in its UserDefaults suite so the
+/// DeviceActivity monitor and shield extensions can read and write them.
+enum AppGroup {
+    static let identifier = "group.dev.bchen.OpenAppLock"
+
+    /// Shared defaults; falls back to standard defaults when the group
+    /// container is unavailable (e.g. entitlement not provisioned yet).
+    static var defaults: UserDefaults {
+        UserDefaults(suiteName: identifier) ?? .standard
+    }
+}

OpenAppLock/Services/LaunchConfiguration.swift

@@ -13,6 +13,10 @@ struct LaunchConfiguration: Equatable {
         case standard
         /// An actively blocking Hard Mode rule ("Locked In") plus an upcoming rule.
         case hardModeActive = "hard-mode-active"
+        /// Limit rules with seeded usage: "Time Keeper" (18m of 45m),
+        /// "Gate Keeper" (2 of 5 opens), and "Doom Scroll" (budget spent →
+        /// blocked until tomorrow).
+        case limits
     }
 
     var isUITesting = false

OpenAppLock/Services/RuleEnforcer.swift

@@ -7,18 +7,32 @@ import Foundation
 import Observation
 
 /// Turns the current set of rules into shield state: schedule rules with an
-/// active, un-paused window are shielded; everything else is cleared.
+/// active, un-paused window are shielded, and limit rules whose daily budget
+/// is spent (per the usage ledger) are shielded until midnight; everything
+/// else is cleared.
 ///
-/// Time-limit and open-limit rules need a DeviceActivity monitor extension to
+/// Background transitions (and usage tracking itself) belong to the
-/// react to usage thresholds in the background; they are persisted and shown
+/// DeviceActivity monitor extension; this keeps shields correct while the
-/// in the UI but not yet enforced here.
+/// app runs.
 @Observable
 final class RuleEnforcer {
     private(set) var blockingRuleIDs: Set<UUID> = []
     private let shields: ShieldApplying
+    /// Day-usage source consulted for limit rules; also exposed to views for
+    /// the Usage section.
+    let usageReader: UsageReading
 
-    init(shields: ShieldApplying) {
+    init(shields: ShieldApplying, usage: UsageReading = UsageLedger()) {
         self.shields = shields
+        self.usageReader = usage
+    }
+
+    /// The day's usage for a rule (nil for schedule rules, which don't track).
+    func usage(
+        for rule: BlockingRule, at now: Date = .now, calendar: Calendar = .current
+    ) -> RuleUsage? {
+        guard rule.kind != .schedule else { return nil }
+        return usageReader.usage(for: rule.id, onDayContaining: now, calendar: calendar)
     }
 
     /// Recomputes shields from scratch. Call on launch, on any rule change,
@@ -29,14 +43,14 @@ final class RuleEnforcer {
             if let pausedUntil = rule.pausedUntil, pausedUntil <= now {
                 rule.pausedUntil = nil
             }
-            guard rule.kind == .schedule,
+            let usage = usage(for: rule, at: now, calendar: calendar)
-                  rule.status(at: now, calendar: calendar).isActive
+            guard rule.status(at: now, calendar: calendar, usage: usage).isActive else { continue }
-            else { continue }
             active.insert(rule.id)
             shields.applyShield(
                 ruleID: rule.id,
                 selectionData: rule.appList?.selectionData,
-                mode: rule.selectionMode,
+                // Allow Only is a schedule-rule concept; limit blocks always Block.
+                mode: rule.kind == .schedule ? rule.selectionMode : .block,
                 blockAdultContent: rule.blockAdultContent
             )
         }

OpenAppLock/Services/SampleRules.swift

@@ -12,6 +12,7 @@ enum SampleRules {
     static func seed(
         _ scenario: LaunchConfiguration.SeedScenario,
         into context: ModelContext,
+        usage: MockUsageLedger? = nil,
         now: Date = .now,
         calendar: Calendar = .current
     ) {
@@ -20,18 +21,31 @@ enum SampleRules {
         let distractions = AppList(name: "Distractions", selectionCount: 3)
         context.insert(distractions)
 
-        let rules =
+        let rules: [BlockingRule]
         switch scenario {
         case .standard:
-                [
+            rules = [
                 activeRule(named: "Work Time", hardMode: false, now: now, calendar: calendar),
                 upcomingRule(named: "Sleep", now: now, calendar: calendar),
             ]
         case .hardModeActive:
-                [
+            rules = [
                 activeRule(named: "Locked In", hardMode: true, now: now, calendar: calendar),
                 upcomingRule(named: "Sleep", now: now, calendar: calendar),
             ]
+        case .limits:
+            let timeKeeper = BlockingRule(
+                name: "Time Keeper", kind: .timeLimit, days: Weekday.everyDay,
+                dailyLimitMinutes: 45)
+            let gateKeeper = BlockingRule(
+                name: "Gate Keeper", kind: .openLimit, days: Weekday.everyDay, maxOpens: 5)
+            let doomScroll = BlockingRule(
+                name: "Doom Scroll", kind: .timeLimit, days: Weekday.everyDay,
+                dailyLimitMinutes: 30)
+            usage?.usageByRule[timeKeeper.id] = RuleUsage(minutesUsed: 18)
+            usage?.usageByRule[gateKeeper.id] = RuleUsage(opensUsed: 2)
+            usage?.usageByRule[doomScroll.id] = RuleUsage(minutesUsed: 30)
+            rules = [timeKeeper, gateKeeper, doomScroll]
         }
         // Relationships are wired only after both sides are managed
         // (see BlockingRule.appList).

OpenAppLock/Services/UsageLedger.swift

@@ -0,0 +1,93 @@
+//
+//  UsageLedger.swift
+//  OpenAppLock
+//
+
+import Foundation
+
+/// What a limit rule has consumed on a given day. Written by the
+/// DeviceActivity monitor (minutes) and shield-action extension (opens);
+/// read by the app for display and enforcement.
+struct RuleUsage: Codable, Equatable {
+    var minutesUsed = 0
+    var opensUsed = 0
+}
+
+/// Read access to per-rule, per-day usage.
+protocol UsageReading: AnyObject {
+    func usage(for ruleID: UUID, onDayContaining date: Date, calendar: Calendar) -> RuleUsage
+}
+
+extension UsageReading {
+    func usage(for ruleID: UUID, onDayContaining date: Date) -> RuleUsage {
+        usage(for: ruleID, onDayContaining: date, calendar: .current)
+    }
+}
+
+/// Usage bookkeeping in the shared app-group defaults, keyed by calendar day
+/// and rule. Old days are simply ignored; midnight needs no reset step.
+final class UsageLedger: UsageReading {
+    private let defaults: UserDefaults
+
+    init(defaults: UserDefaults = AppGroup.defaults) {
+        self.defaults = defaults
+    }
+
+    /// "2026-06-12" — calendar-date key so budgets roll over at midnight.
+    static func dayKey(for date: Date, calendar: Calendar = .current) -> String {
+        let parts = calendar.dateComponents([.year, .month, .day], from: date)
+        return String(format: "%04d-%02d-%02d", parts.year ?? 0, parts.month ?? 0, parts.day ?? 0)
+    }
+
+    func usage(
+        for ruleID: UUID, onDayContaining date: Date, calendar: Calendar = .current
+    ) -> RuleUsage {
+        guard let data = defaults.data(forKey: key(ruleID, date, calendar)),
+              let usage = try? JSONDecoder().decode(RuleUsage.self, from: data)
+        else { return RuleUsage() }
+        return usage
+    }
+
+    func setUsage(
+        _ usage: RuleUsage, for ruleID: UUID, onDayContaining date: Date,
+        calendar: Calendar = .current
+    ) {
+        guard let data = try? JSONEncoder().encode(usage) else { return }
+        defaults.set(data, forKey: key(ruleID, date, calendar))
+    }
+
+    /// Threshold events report cumulative totals, so minutes only move up.
+    func recordMinutesUsed(
+        _ minutes: Int, for ruleID: UUID, onDayContaining date: Date,
+        calendar: Calendar = .current
+    ) {
+        var usage = self.usage(for: ruleID, onDayContaining: date, calendar: calendar)
+        usage.minutesUsed = max(usage.minutesUsed, minutes)
+        setUsage(usage, for: ruleID, onDayContaining: date, calendar: calendar)
+    }
+
+    @discardableResult
+    func recordOpen(
+        for ruleID: UUID, onDayContaining date: Date, calendar: Calendar = .current
+    ) -> RuleUsage {
+        var usage = self.usage(for: ruleID, onDayContaining: date, calendar: calendar)
+        usage.opensUsed += 1
+        setUsage(usage, for: ruleID, onDayContaining: date, calendar: calendar)
+        return usage
+    }
+
+    private func key(_ ruleID: UUID, _ date: Date, _ calendar: Calendar) -> String {
+        "usage/\(Self.dayKey(for: date, calendar: calendar))/\(ruleID.uuidString)"
+    }
+}
+
+/// Seedable in-memory usage for tests and UI-test scenarios.
+final class MockUsageLedger: UsageReading {
+    var usageByRule: [UUID: RuleUsage] = [:]
+
+    func usage(
+        for ruleID: UUID, onDayContaining date: Date, calendar: Calendar
+    ) -> RuleUsage {
+        usageByRule[ruleID] ?? RuleUsage()
+    }
+}

OpenAppLock/Views/AppLists/AppListPickerSheet.swift

@@ -15,6 +15,7 @@ struct AppListPickerSheet: View {
 
     @Environment(\.dismiss) private var dismiss
     @Environment(\.modelContext) private var modelContext
+    @Environment(RuleEnforcer.self) private var enforcer
     @Query(sort: \AppList.createdAt) private var lists: [AppList]
     @Query private var rules: [BlockingRule]
 
@@ -22,10 +23,11 @@ struct AppListPickerSheet: View {
     @State private var creatingList = false
     @State private var deletionBlocked = false
 
-    /// While any hard-mode rule is actively blocking, lists are read-only —
+    /// While any hard-mode rule is actively blocking (by the clock or a spent
-    /// editing one would be a back door out of the hard block.
+    /// limit budget), lists are read-only — editing one would be a back door
+    /// out of the hard block.
     private var listsLocked: Bool {
-        !RulePolicy.canEditAppLists(rules: rules)
+        !RulePolicy.canEditAppLists(rules: rules, usageFor: { enforcer.usage(for: $0) })
     }
 
     var body: some View {

OpenAppLock/Views/Apps/AppsHomeView.swift

@@ -50,7 +50,7 @@ struct AppsHomeView: View {
         ) {
             Button("Unblock", role: .destructive) {
                 if let rule = unblockCandidate {
-                    RulePolicy.unblock(rule)
+                    RulePolicy.unblock(rule, usage: enforcer.usage(for: rule))
                     refreshEnforcement()
                 }
                 unblockCandidate = nil
@@ -74,15 +74,22 @@ struct AppsHomeView: View {
     private func ruleList(now: Date) -> some View {
         List {
             blockedSection(now: now)
+            usageSection(now: now)
             rulesSection(now: now)
         }
     }
 
+    /// Status with the day's usage folded in, so limit rules whose budget is
+    /// spent count as actively blocking.
+    private func liveStatus(for rule: BlockingRule, now: Date) -> RuleStatus {
+        rule.status(at: now, usage: enforcer.usage(for: rule, at: now))
+    }
+
     // MARK: - Blocked Apps
 
     @ViewBuilder
     private func blockedSection(now: Date) -> some View {
-        let blocking = rules.filter { $0.status(at: now).isActive }
+        let blocking = rules.filter { liveStatus(for: $0, now: now).isActive }
         Section {
             if blocking.isEmpty {
                 Text("Nothing is blocked right now.")
@@ -100,7 +107,7 @@ struct AppsHomeView: View {
 
     private func blockedRow(for rule: BlockingRule, now: Date) -> some View {
         Button {
-            if RulePolicy.canUnblock(rule, at: now) {
+            if RulePolicy.canUnblock(rule, usage: enforcer.usage(for: rule, at: now), at: now) {
                 unblockCandidate = rule
             } else {
                 hardModeBlockedAttempt = true
@@ -120,6 +127,53 @@ struct AppsHomeView: View {
         .accessibilityIdentifier("blockedTile-\(rule.name)")
     }
 
+    // MARK: - Usage
+
+    /// Live tracking for every limit rule scheduled today: how much of the
+    /// daily budget is spent and what remains.
+    @ViewBuilder
+    private func usageSection(now: Date) -> some View {
+        let tracked = rules.filter {
+            $0.kind != .schedule && $0.isEnabled && $0.isScheduledToday(at: now)
+        }
+        if !tracked.isEmpty {
+            Section {
+                ForEach(tracked) { rule in
+                    usageRow(for: rule, now: now)
+                }
+            } header: {
+                Text("Usage").textCase(nil)
+            }
+        }
+    }
+
+    private func usageRow(for rule: BlockingRule, now: Date) -> some View {
+        let usage = enforcer.usage(for: rule, at: now) ?? RuleUsage()
+        let isPaused =
+            if case .paused = liveStatus(for: rule, now: now) { true } else { false }
+        return HStack {
+            Image(systemName: rule.kind.symbolName)
+                .foregroundStyle(.tint)
+                .frame(width: 28)
+            VStack(alignment: .leading, spacing: 2) {
+                Text(rule.name)
+                    .foregroundStyle(Color.primary)
+                Text(UsageDisplay.subtitle(for: rule, usage: usage))
+                    .font(.caption)
+                    .foregroundStyle(Color.secondary)
+            }
+            Spacer()
+            Text(UsageDisplay.remainingLabel(for: rule, usage: usage, isPaused: isPaused))
+                .font(.subheadline)
+                .foregroundStyle(
+                    rule.limitReached(given: usage) && !isPaused
+                        ? AnyShapeStyle(Color.red) : AnyShapeStyle(Color.secondary)
+                )
+        }
+        .accessibilityElement(children: .combine)
+        .accessibilityIdentifier("usageRow-\(rule.name)")
+    }
+
     // MARK: - Rules
 
     @ViewBuilder
@@ -147,7 +201,7 @@ struct AppsHomeView: View {
     }
 
     private func ruleRow(for rule: BlockingRule, now: Date) -> some View {
-        let status = rule.status(at: now)
+        let status = liveStatus(for: rule, now: now)
         return Button {
             detailRule = rule
         } label: {
@@ -179,11 +233,15 @@ struct AppsHomeView: View {
     private func statusText(for rule: BlockingRule, status: RuleStatus, now: Date) -> String {
         switch rule.kind {
         case .schedule:
-            status.label(relativeTo: now)
+            return status.label(relativeTo: now)
         case .timeLimit:
-            rule.isEnabled ? "\(rule.dailyLimitMinutes)m / day" : "Disabled"
+            // While blocking (or paused/disabled) show the live state; the
+            // budget is only informative while it is still being spent.
+            if case .upcoming = status { return "\(rule.dailyLimitMinutes)m / day" }
+            return status.label(relativeTo: now)
         case .openLimit:
-            rule.isEnabled ? "\(rule.maxOpens) opens / day" : "Disabled"
+            if case .upcoming = status { return "\(rule.maxOpens) opens / day" }
+            return status.label(relativeTo: now)
         }
     }
 

OpenAppLock/Views/Rules/RuleDetailSheet.swift

@@ -14,6 +14,7 @@ struct RuleDetailSheet: View {
 
     @Environment(\.dismiss) private var dismiss
     @Environment(\.modelContext) private var modelContext
+    @Environment(RuleEnforcer.self) private var enforcer
     @State private var isEditing = false
     @State private var pendingDeletion = false
 
@@ -50,13 +51,14 @@ struct RuleDetailSheet: View {
     }
 
     private func detailList(now: Date) -> some View {
-        let status = rule.status(at: now)
+        let usage = enforcer.usage(for: rule, at: now)
+        let status = rule.status(at: now, usage: usage)
         return List {
             Section {
                 detailRows
             }
             Section {
-                if RulePolicy.canEdit(rule, at: now) {
+                if RulePolicy.canEdit(rule, usage: usage, at: now) {
                     Button {
                         isEditing = true
                     } label: {

OpenAppLockTests/UsageTests.swift

@@ -0,0 +1,222 @@
+//
+//  UsageTests.swift
+//  OpenAppLockTests
+//
+
+import Foundation
+import Testing
+
+@testable import OpenAppLock
+
+@MainActor
+@Suite("Usage ledger")
+struct UsageLedgerTests {
+    private func makeLedger() -> UsageLedger {
+        let suiteName = "usage-tests-\(UUID().uuidString)"
+        let defaults = UserDefaults(suiteName: suiteName)!
+        defaults.removePersistentDomain(forName: suiteName)
+        return UsageLedger(defaults: defaults)
+    }
+
+    let monday = date(2025, 1, 6, 10, 0)
+    let tuesday = date(2025, 1, 7, 10, 0)
+
+    @Test("Day keys are calendar dates")
+    func dayKey() {
+        #expect(UsageLedger.dayKey(for: monday, calendar: utc) == "2025-01-06")
+        #expect(UsageLedger.dayKey(for: date(2025, 12, 31, 23, 59), calendar: utc) == "2025-12-31")
+    }
+
+    @Test("Usage defaults to zero and round-trips")
+    func roundTrip() {
+        let ledger = makeLedger()
+        let ruleID = UUID()
+        #expect(ledger.usage(for: ruleID, onDayContaining: monday, calendar: utc) == RuleUsage())
+
+        ledger.setUsage(
+            RuleUsage(minutesUsed: 12, opensUsed: 3),
+            for: ruleID, onDayContaining: monday, calendar: utc
+        )
+        let read = ledger.usage(for: ruleID, onDayContaining: monday, calendar: utc)
+        #expect(read.minutesUsed == 12)
+        #expect(read.opensUsed == 3)
+    }
+
+    @Test("Recorded minutes are monotonic per day")
+    func monotonicMinutes() {
+        let ledger = makeLedger()
+        let ruleID = UUID()
+        ledger.recordMinutesUsed(10, for: ruleID, onDayContaining: monday, calendar: utc)
+        ledger.recordMinutesUsed(7, for: ruleID, onDayContaining: monday, calendar: utc)
+        #expect(ledger.usage(for: ruleID, onDayContaining: monday, calendar: utc).minutesUsed == 10)
+        ledger.recordMinutesUsed(25, for: ruleID, onDayContaining: monday, calendar: utc)
+        #expect(ledger.usage(for: ruleID, onDayContaining: monday, calendar: utc).minutesUsed == 25)
+    }
+
+    @Test("Opens increment per day")
+    func opensIncrement() {
+        let ledger = makeLedger()
+        let ruleID = UUID()
+        ledger.recordOpen(for: ruleID, onDayContaining: monday, calendar: utc)
+        ledger.recordOpen(for: ruleID, onDayContaining: monday, calendar: utc)
+        #expect(ledger.usage(for: ruleID, onDayContaining: monday, calendar: utc).opensUsed == 2)
+    }
+
+    @Test("Usage is separated by day and rule")
+    func separation() {
+        let ledger = makeLedger()
+        let first = UUID()
+        let second = UUID()
+        ledger.recordMinutesUsed(30, for: first, onDayContaining: monday, calendar: utc)
+        #expect(ledger.usage(for: first, onDayContaining: tuesday, calendar: utc) == RuleUsage())
+        #expect(ledger.usage(for: second, onDayContaining: monday, calendar: utc) == RuleUsage())
+    }
+}
+
+@MainActor
+@Suite("Usage-aware rule status")
+struct UsageStatusTests {
+    let mondayMorning = date(2025, 1, 6, 10, 0)
+
+    private func timeLimitRule(limit: Int = 45) -> BlockingRule {
+        BlockingRule(name: "Time Keeper", kind: .timeLimit, days: Weekday.everyDay,
+                     dailyLimitMinutes: limit)
+    }
+
+    private func openLimitRule(maxOpens: Int = 5) -> BlockingRule {
+        BlockingRule(name: "Gate Keeper", kind: .openLimit, days: Weekday.everyDay,
+                     maxOpens: maxOpens)
+    }
+
+    @Test("A time-limit rule with budget left is not active")
+    func budgetLeftNotActive() {
+        let rule = timeLimitRule()
+        let status = rule.status(at: mondayMorning, calendar: utc, usage: RuleUsage(minutesUsed: 20))
+        #expect(!status.isActive)
+    }
+
+    @Test("A time-limit rule blocks until midnight once its budget is spent")
+    func spentBudgetBlocksUntilMidnight() {
+        let rule = timeLimitRule(limit: 45)
+        let status = rule.status(at: mondayMorning, calendar: utc, usage: RuleUsage(minutesUsed: 45))
+        #expect(status == .active(until: date(2025, 1, 7, 0, 0)))
+    }
+
+    @Test("An open-limit rule blocks once opens are exhausted")
+    func exhaustedOpensBlock() {
+        let rule = openLimitRule(maxOpens: 5)
+        let status = rule.status(at: mondayMorning, calendar: utc, usage: RuleUsage(opensUsed: 5))
+        #expect(status == .active(until: date(2025, 1, 7, 0, 0)))
+    }
+
+    @Test("A spent budget on a disabled day does not block")
+    func disabledDayDoesNotBlock() {
+        let rule = timeLimitRule()
+        rule.days = Weekday.weekends
+        let status = rule.status(at: mondayMorning, calendar: utc, usage: RuleUsage(minutesUsed: 99))
+        #expect(!status.isActive)
+    }
+
+    @Test("Unblocking a limit-blocked rule pauses it until midnight")
+    func unblockPausesUntilMidnight() {
+        let rule = timeLimitRule(limit: 45)
+        let usage = RuleUsage(minutesUsed: 45)
+        #expect(RulePolicy.canUnblock(rule, usage: usage, at: mondayMorning, calendar: utc))
+        #expect(RulePolicy.unblock(rule, usage: usage, at: mondayMorning, calendar: utc))
+        #expect(rule.pausedUntil == date(2025, 1, 7, 0, 0))
+        #expect(
+            rule.status(at: mondayMorning, calendar: utc, usage: usage)
+                == .paused(until: date(2025, 1, 7, 0, 0)))
+    }
+
+    @Test("Hard Mode locks a limit-blocked rule and its app lists")
+    func hardModeLocksLimitBlock() {
+        let rule = timeLimitRule(limit: 45)
+        rule.hardMode = true
+        let usage = RuleUsage(minutesUsed: 45)
+        #expect(RulePolicy.isHardLocked(rule, usage: usage, at: mondayMorning, calendar: utc))
+        #expect(!RulePolicy.canUnblock(rule, usage: usage, at: mondayMorning, calendar: utc))
+        #expect(
+            !RulePolicy.canEditAppLists(
+                rules: [rule], usageFor: { _ in usage }, at: mondayMorning, calendar: utc))
+    }
+}
+
+@MainActor
+@Suite("Enforcement of limit rules")
+struct UsageEnforcementTests {
+    let mondayMorning = date(2025, 1, 6, 10, 0)
+
+    @Test("A spent time-limit rule is shielded in Block mode")
+    func shieldsSpentTimeLimit() {
+        let shields = MockShieldController()
+        let ledger = MockUsageLedger()
+        let enforcer = RuleEnforcer(shields: shields, usage: ledger)
+        let rule = BlockingRule(
+            name: "Time Keeper", kind: .timeLimit, days: Weekday.everyDay, dailyLimitMinutes: 45)
+        ledger.usageByRule[rule.id] = RuleUsage(minutesUsed: 45)
+
+        enforcer.refresh(rules: [rule], at: mondayMorning, calendar: utc)
+
+        #expect(shields.shieldedRuleIDs == [rule.id])
+        #expect(shields.appliedModes[rule.id] == .block)
+    }
+
+    @Test("A limit rule with budget left is not shielded")
+    func leavesUnspentLimitAlone() {
+        let shields = MockShieldController()
+        let ledger = MockUsageLedger()
+        let enforcer = RuleEnforcer(shields: shields, usage: ledger)
+        let rule = BlockingRule(
+            name: "Gate Keeper", kind: .openLimit, days: Weekday.everyDay, maxOpens: 5)
+        ledger.usageByRule[rule.id] = RuleUsage(opensUsed: 2)
+
+        enforcer.refresh(rules: [rule], at: mondayMorning, calendar: utc)
+
+        #expect(shields.shieldedRuleIDs.isEmpty)
+    }
+}
+
+@MainActor
+@Suite("Usage display strings")
+struct UsageDisplayTests {
+    let timeRule = BlockingRule(
+        name: "Time Keeper", kind: .timeLimit, days: Weekday.everyDay, dailyLimitMinutes: 45)
+    let openRule = BlockingRule(
+        name: "Gate Keeper", kind: .openLimit, days: Weekday.everyDay, maxOpens: 5)
+
+    @Test("Time-limit rows show minutes used and remaining")
+    func timeLimitStrings() {
+        let usage = RuleUsage(minutesUsed: 18)
+        #expect(UsageDisplay.subtitle(for: timeRule, usage: usage) == "18m of 45m used today")
+        #expect(UsageDisplay.remainingLabel(for: timeRule, usage: usage, isPaused: false) == "27m left")
+    }
+
+    @Test("Open-limit rows show opens used and remaining")
+    func openLimitStrings() {
+        let usage = RuleUsage(opensUsed: 2)
+        #expect(UsageDisplay.subtitle(for: openRule, usage: usage) == "2 of 5 opens today")
+        #expect(UsageDisplay.remainingLabel(for: openRule, usage: usage, isPaused: false) == "3 opens left")
+
+        let oneLeft = RuleUsage(opensUsed: 4)
+        #expect(UsageDisplay.remainingLabel(for: openRule, usage: oneLeft, isPaused: false) == "1 open left")
+    }
+
+    @Test("Spent budgets read as blocked, or unblocked while paused")
+    func exhaustedStrings() {
+        let spent = RuleUsage(minutesUsed: 45)
+        #expect(
+            UsageDisplay.remainingLabel(for: timeRule, usage: spent, isPaused: false)
+                == "Blocked until tomorrow")
+        #expect(
+            UsageDisplay.remainingLabel(for: timeRule, usage: spent, isPaused: true)
+                == "Unblocked until tomorrow")
+        #expect(UsageDisplay.subtitle(for: timeRule, usage: spent) == "45m of 45m used today")
+    }
+
+    @Test("Overshoot clamps to the budget")
+    func overshootClamps() {
+        let over = RuleUsage(minutesUsed: 60)
+        #expect(UsageDisplay.subtitle(for: timeRule, usage: over) == "45m of 45m used today")
+    }
+}

OpenAppLockUITests/UsageUITests.swift

@@ -0,0 +1,49 @@
+//
+//  UsageUITests.swift
+//  OpenAppLockUITests
+//
+
+import XCTest
+
+/// The Usage section under Blocked Apps — seeded with limit rules at various
+/// budget states ("Time Keeper" 18m/45m, "Gate Keeper" 2/5 opens,
+/// "Doom Scroll" spent → blocked).
+final class UsageUITests: XCTestCase {
+    override func setUpWithError() throws {
+        continueAfterFailure = false
+    }
+
+    func testUsageSectionShowsTimeAndOpenBudgets() throws {
+        let app = XCUIApplication.launchOpenAppLock(seedScenario: "limits")
+
+        XCTAssertTrue(app.staticTexts["Usage"].waitToAppear().exists)
+
+        let timeRow = app.element("usageRow-Time Keeper").waitToAppear()
+        XCTAssertTrue(timeRow.label.contains("18m of 45m used today"), "Got: \(timeRow.label)")
+        XCTAssertTrue(timeRow.label.contains("27m left"), "Got: \(timeRow.label)")
+
+        let openRow = app.element("usageRow-Gate Keeper").waitToAppear()
+        XCTAssertTrue(openRow.label.contains("2 of 5 opens today"), "Got: \(openRow.label)")
+        XCTAssertTrue(openRow.label.contains("3 opens left"), "Got: \(openRow.label)")
+    }
+
+    func testSpentBudgetShowsAsBlockedUntilTomorrow() throws {
+        let app = XCUIApplication.launchOpenAppLock(seedScenario: "limits")
+
+        let spentRow = app.element("usageRow-Doom Scroll").waitToAppear()
+        XCTAssertTrue(spentRow.label.contains("Blocked until tomorrow"), "Got: \(spentRow.label)")
+        // A spent budget is a real block: the rule surfaces in Blocked Apps.
+        XCTAssertTrue(app.buttons["blockedTile-Doom Scroll"].waitToAppear().exists)
+    }
+
+    func testSpentBudgetCanBeUnblockedUntilTomorrow() throws {
+        let app = XCUIApplication.launchOpenAppLock(seedScenario: "limits")
+
+        app.buttons["blockedTile-Doom Scroll"].waitToAppear().tap()
+        app.sheets.buttons["Unblock"].waitToAppear().tap()
+
+        app.staticTexts["nothingBlockedLabel"].waitToAppear()
+        let row = app.element("usageRow-Doom Scroll").waitToAppear()
+        XCTAssertTrue(row.label.contains("Unblocked until tomorrow"), "Got: \(row.label)")
+    }
+}