accurate_step_counter

Added

• iOS support via HealthKit (health package) with filtered step reads and HC smoothing semantics aligned with meltdown.
• New internal IosHealthStepDetector service that emits realtime step events from Health app totals.
• Cross-platform example flow now handles iOS initialization cleanly.

Changed

• watchTodaySteps() remains immediate and floor-protected while now supporting iOS live step source.
• Package positioning updated from Android-only to Android + iOS HealthKit.

Fixed

• Native event merge now always applies floor protection before emitting (prevents downward jitter on transient resets).
• Rotation drain persists previous day totals into SQLite with date anchoring.

Breaking

• Primary detection is now TYPE_STEP_COUNTER FGS on all Android API 24+ (including Samsung). Previous API≤29 / non-Samsung gate removed.
• SmartMergeHelper.mergeStepCounts semantics changed — no longer naive max(). Uses StepLogic (HC duplication band, sensor overcount at 1.10×, HC can correct downward, server floor). Prefer SmartMergeHelper.merge() for full MergeDecision flags.
• Legacy auto-start of StepCounterForegroundService on app termination is off by default to prevent dual-FGS fights.
• StepDetectorConfig.useForegroundServiceOnOldDevices defaults to false (legacy sensors_plus fallback only).

Added

• Production-hardened StepCounterService: prefs persist, reboot detect, burst/minute/hour caps with baseline fold-in, vehicle/bicycle Activity Recognition filter, TYPE_STEP_DETECTOR cross-check, exact midnight alarm, BootReceiver, TimeChangeReceiver, rotation stamps
• ActivityClassifier + soft-fail without Play Services (play-services-location)
• Dart policies: StepLogic, MergePolicy, smoothHcReading, RotationGuard, StepRateLimiter
• Platform APIs: setNotificationDisplay, forceUpdateTodaySteps, consumeLastRotation, resetNativeStepState
• startTracking() — one-call setup (DB + FGS + aggregated logging)
• Short aliases: isBatteryOptimized(), requestBatteryOptimization()
• Safe calibration from SQLite today (sensor=0, seed ≤40k) on start
• Native↔SQLite reconcile on aggregated start (fixes undercount after process death)
• Rotation drain on start / resume / step stream
• Ported production policy unit tests under test/policy/
• Soft uses-feature for stepcounter/stepdetector (required=false)
• Consumer ProGuard keep rules for services/receivers

Fixed (production DX / hardening)

• Skip legacy terminated-prefs sync when the native FGS is available (no dual recovery)
• Example + verification check TYPE_STEP_COUNTER FGS, not fallback detector
• Removed 500ms artificial delay from initSteps (now aliases startTracking)
• Collapsed duplicate getTodaySteps / getYesterdaySteps definitions
• Cold-start day-gap restore stamps KEY_LAST_ROTATION_* and persists rotated prefs
• Activity Recognition PendingIntent uses explicit component + unique request code; receiver in manifest
• Removed Play-risk permissions USE_EXACT_ALARM, BODY_SENSORS, BODY_SENSORS_BACKGROUND, HIGH_SAMPLING_RATE_SENSORS
• Plugin no longer permanently registers a second TYPE_STEP_COUNTER listener (battery)
• Kotlin unit test matches real MethodChannel API
• NotificationChannel creation guarded for API 24–25 (StepCounterService)
• dispose() / stopLogging() flush write buffer and cancel flush timer

Migration

1. Bump to ^3.0.0 and request ACTIVITY_RECOGNITION + notifications before startTracking().
2. Prefer await steps.startTracking() over the old three-call sequence.
3. If you relied on naive max merge, switch to SmartMergeHelper.merge(...) and handle MergeDecision.
4. Keep notification synced with setNativeNotificationDisplay(merged) — do not force-write merged HC into sensor baseline.
5. Supply HC/server yourself (BYO); package does not embed Health Connect SDK.

Major: Native Step Service + Smart Merge

This release promotes the native TYPE_STEP_COUNTER foreground service as the primary detection strategy and adds the SmartMergeHelper utility for combining multiple step sources.

Added

• SmartMergeHelper — combine sensor + Health Connect + server (naive max in 2.x)
• Native Step Service Status API — isNativeStepServiceRunning(), isUsingNativeStepService

Changed

• VERSION BUMP to 2.0.0
• README rewritten for TYPE_STEP_COUNTER architecture

Fixed

• StepCounterService.kt — added isRunning flag

Removed

• Stale Hive artifacts

Fixed

• Background isolate sqflite initialization error — Added DartPluginRegistrant.ensureInitialized() to isolate entry point

Added

• Terminated sync gap reconciliation with idempotent deterministic gap keys
• Single-flight terminated sync to prevent concurrent reprocessing
• Production example flow in example app

Added

• Automatic 30-day log retention policy
• Database write batching (3-second buffer)
• Background isolate for database operations (StepRecordConfig.lowEndDevice())
• Stream emission throttling (max 10Hz)

Verified

• ANR-safe architecture audit: all Kotlin I/O on Dispatchers.IO, async SharedPreferences, background SQLite

Changed

• Database migration: Hive → sqflite — Indexed SQL queries, smaller footprint, no code generation needed

Removed

• Hive dependencies (hive, hive_flutter, hive_generator, build_runner)

See git history for pre-1.9.0 notes.