Pascal Barometer vs BaroWatch Barometer

Pascal turns your iPhone's built-in barometer into a precision pressure instrument. It shows what the air is actually doing, measured on your phone, with no internet required. READ THE TREND See whether pressure is steady, rising or falling, and how fast, using the same 3-hour bands meteorologists use. Falling pressure usually comes before unsettled weather, rising pressure before settled weather. Pascal tells you what it measures, not guesses. ALERTS ON YOUR TERMS • Storm alerts when pressure drops at storm rates • Pressure swing alerts when pressure rises or falls 4, 6 or 8 hPa within 12 hours, with a 60-day swing log • Daily limits and sensitivity you control HISTORY AND ALTITUDE • Pressure and altitude charts over 12 hours, 48 hours or 7 days • Total climb and descent for walks, hikes and drives • Cabin altitude tracking on flights EVERYWHERE YOU LOOK • Home Screen widgets, Lock Screen and Dynamic Island Live Activities • Apple Watch app and complications • Built for iPhone Duo: a full instrument panel unfolded, and the complete app on the front screen ACCURATE BY DESIGN Pascal reduces pressure to sea level using your altitude, and checks every GPS altitude against the barometer itself, so changing height or a bad GPS fix never throws your readings off. WORKS OFFLINE, PRIVATE BY DESIGN No internet, no account, no cloud. Everything is measured and stored on your phone. Location is used only to work out your altitude and is never stored or shared. Pascal reports measured pressure changes. It is not a weather forecast or medical advice.

BaroWatch turns your iPhone, iPad and Apple Watch into a precision barometer. Track pressure changes, spot weather trends and get warned before the storm arrives. WHY BAROWATCH • On every device — iPhone, iPad and Apple Watch share readings automatically • Full privacy — no cloud, no servers, no tracking, no ads • Works offline — measurements keep running in the background • Your unit — hPa, mbar, kPa, mmHg or inHg, the way pilots, sailors and meteorologists are used to CORE FEATURES Pressure measurement • Reads the built-in barometer in iPhone, iPad (iPadOS 17+) and Apple Watch • QFE (station pressure) and QNH (corrected to sea level) • Automatic altitude correction via GPS — or set your altitude manually • Optional manual calibration offset Charts & visualization • Line, bar and area charts with smooth gradients • Color-coded bars show falling, stable and rising trends • Adjustable time ranges from 1 hour to 48 hours • Tap any point for the exact value, time and source • Day stripes for a multi-day overview • Freely configurable color thresholds for high and low pressure ranges Apple Watch • Native Watch app with the full chart history • Complications for Inline, Circular, Rectangular and Corner • Background updates keep your readings current Widgets • Home Screen widgets for iPhone and iPad with a sparkline chart • Lock Screen widgets in Inline, Circular and Rectangular Alerts • Local notifications when pressure changes rapidly • Independent thresholds for falling and rising pressure • Adjustable observation windows (15 min to 3 h) and repeat cooldowns 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 refresh • Optional background location keeps the barometer running while you walk, drive or sleep • Smart wake-up whenever your Apple Watch syncs Privacy by design • Pressure and altitude data stay on your device • No analytics, no third-party SDKs, no ads • GPS altitude lives in memory only — your exact position is never stored Available in 29 languages. Whether you're hiking, fishing, sailing or flying — BaroWatch gives you precise data and full control over your privacy.