FAQ

Is there an iPhone version? In the works.

Which varios work? Thermik is built around the Skytraxx 2.0 but reads any standard IGC file, plus GPX, KML and KMZ from other apps (e.g. ApexGPS, Komoot, Strava exports, Flightradar24 KML).

The track is under the ground / floating. Choose Fused as the altitude source (the default). Raw pressure altitude is referenced to the standard atmosphere and can be off by up to ~200 m. Hikes, rides and drives are always drawn on the terrain.

The terrain looks blurry. Outside Austria, Switzerland, Bavaria and France the imagery is Sentinel-2 at 10 m per pixel: sharp from a distance, soft up close.

A recording was dated wrong. Fix it in Edit activity → Start: the whole track moves, the original file stays untouched.

Does Thermik need the internet? Only to download an activity’s terrain, imagery and place names, once. Replay, logbook, export and sharing work offline.

Does Thermik change my track files? No. Imported folders are only read, and IGC export is the original byte for byte.

Does it use my location? No. Thermik has no location permission; it only reads the files you give it.

How do I clear downloaded terrain? Settings → Storage → Downloaded terrain and imagery → Clear.

Thermik crashed. Settings → About → Share last crash report sends the error to the developer (app version, phone model, no logbook data).

Other questions: sandwalker.one@proton.me