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.