Barometer Altimeter Pro for iPhone

Barometer Utility for iPhone, iPad and Apple Watch

Overview This app reads the built‑in barometric sensor found on modern iPhones, iPads and Apple Watches to give you local atmospheric pressure information. It displays recent pressure history and can help indicate approaching weather changes by tracking how pressure moves over time.

How it operates The app relies on on‑device sensors only: the barometer and GPS. No network connection is required and the app does not transmit any data off your device. Altitude is estimated using GPS data so the app can provide an elevation estimate anywhere you go.

Key features

• Tracks pressure history for up to 30 days so you can observe longer‑term trends.
• Uses the device’s barometric sensor together with GPS to collect readings.
• Works without an internet connection and does not send your sensor data anywhere.
• Helps flag potential weather changes by monitoring pressure variations over time.
• Compatible with recent models of iPhone, iPad and Apple Watch that include a barometer.

Accuracy and limitations

• A single pressure reading cannot reliably predict the weather; trends matter far more than one snapshot.
• This app is intended for general consumer use and is not a calibrated instrument for scientific measurements.
• Altitude values are estimated from GPS and should be treated as approximations rather than exact surveying data.
• Some other apps or dedicated instruments may provide more precise measurements; this app emphasizes trend visibility rather than lab‑grade accuracy.

Privacy and connectivity The app operates fully offline. No internet connection is required for its core functions, and it does not upload your sensor or location readings.