BaroWatch Barometer

BaroWatch turns your iPhone, iPad and Apple Watch into a precision barometer. Track atmospheric pressure changes, spot weather trends, and get notified before storms arrive. WHY BAROWATCH • On every device — iPhone, iPad and Apple Watch share readings seamlessly • Total privacy — no cloud, no servers, no tracking, no ads • Open standard units — hectopascals (hPa), the unit pilots and meteorologists use KEY FEATURES Pressure measurement • Reads from the built-in barometer in iPhone (6 and newer), every iPad with iPadOS 17+, and Apple Watch • QFE (raw station pressure) and QNH (sea-level corrected) modes • Automatic altitude correction via GPS — or set a manual altitude • Optional manual calibration offset Charts & visualization • Line, bar and area charts with smooth gradients • Color-coded bars highlighting falling, stable and rising trends • Adjustable time ranges from 1 hour up to 48 hours • Tap any point to see the exact value, time and source • Day stripes for easy multi-day reading • Configurable color thresholds for high- and low-pressure zones Apple Watch • Native watch app with full chart history • Complications for inline, circular, rectangular and corner positions • Background updates keep readings fresh Widgets • Home Screen widgets for iPhone and iPad with sparkline charts • Lock Screen widgets in inline, circular and rectangular formats Alerts • Local notifications when pressure changes rapidly • Independent thresholds for falling and rising pressure • Adjustable observation window (15 min to 3 hours) and cooldown Multi-device sync • iPhone ↔ Apple Watch: automatic via WatchConnectivity • iPhone ↔ iPad: peer-to-peer over local Wi-Fi or Bluetooth, paired with a 6-digit code • No internet connection required Background freshness • Optional background location keeps the barometer running while you walk, drive or sleep • Apple's BGAppRefreshTask schedules periodic readings • Smart wake-up when Watch data syncs Privacy by design • Barometer and altitude data stay on your device • No analytics, no third-party SDKs, no advertising • GPS altitude is held in memory only — exact location is never stored Available in 29 languages. Whether you're a hiker tracking altitude, a pilot watching QNH, a weather enthusiast spotting fronts, or just sensitive to pressure changes — BaroWatch gives you precise data with full control over your privacy.