WatchBarometer

WatchBarometer turns raw pressure into readable context with live pressure, sea-level pressure, short-term weather trend, and a real GPS-based altitude timeline.

WatchBarometer is a pressure-first barometer for iPhone and Apple Watch.

The app turns raw sensor pressure into something you can actually read:

• current pressure as a direct sensor value or compensated to sea level
• short-term weather reading from pressure change
• pressure history across short and long ranges
• altitude timeline from GPS, with optional barometer refinement between anchor points

That is the core message of WatchBarometer: Pressure alone is not enough. Trend, sea-level context, and altitude are what make a barometer useful.

Highlights:

• live pressure on iPhone and Apple Watch
• direct Sensor / NN switch for the current reading
• history from 6h to All
• compare raw pressure and altitude-aware sea-level pressure
• low, normal, and high pressure zones based on NN pressure
• altitude timeline with GPS only or GPS + Baro
• focused sessions for dedicated measurements
• widgets, Live Activity, and watch complications

WatchBarometer builds its history from two sources:

• the device's running barometer stream
• HealthKit samples that already include barometric pressure metadata

The app is read-only with HealthKit. It does not interpret oxygen saturation medically. It only uses samples when Apple already includes barometric pressure metadata in the sample itself.

Important:

• absolute low-pressure and high-pressure classification is based only on compensated sea-level pressure
• raw sensor pressure is not mislabeled across different elevations

WatchBarometer is for people who want to understand pressure, not just see a number: weather watchers, hikers, altitude nerds, and anyone who wants a clear read on trend and height.