AltiTracker runs automatically in the background and keeps track of altitude changes in real time. The app's interactive graphs let you see and explore altitude changes and trends over time..

AltiTracker lets you select either sea-level operation or a relative altitude mode that tracks your altitude relative to a selected reference altitude (for example, your altitude relative to your base camp).

Optional CSV export/import capabilities let you save your altitude data at high-resolution (5-second intervals), and you can explore previously saved CSV altitude data directly in the app.

Optional Watch capabilities include the ability to run the app stand-alone on your Watch and to see live altitude updates on the app's complications whether you're running the app on your iPhone or on your Watch. Real-time Watch complications can show altitude, relative altitude, vertical speed, and reference pressure. The Watch app also let you easily adjust settings such as reference pressure or relative altitude.

Running stats let you know your total climb and descent info as well as min/max altitude.

You can directly set either your sea level altitude or pressure, or use the GPS feature to obtain a reference altitude automatically.

An adjustable auto-off feature helps ensure that you maximize battery life by automatically turning off operation after the desired period.

And the optional BaroTrak feature helps minimize the classic problem of weather-based altimeter "drift" between active climbs.

The app supports both meters and feet for altitude, and selectable units for pressure.

In short, we set out to build the most capable pressure-based altimieter out there and we hope you give it a try!

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