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OpenTracks vs Fitness Calendar: catalog facts
OpenTracks	Fitness Calendar
Free Free and open source.	Free Free and open source under GPL-2.0-only.
Android	Android
Records GPS tracks for runs, rides and hikes Supports Bluetooth Low Energy heart rate sensors	Tracks activities and records sessions Imports GPX files and supports custom activity types
Android only No hosted sync or social features	Internet access is needed if you enable MapLibre maps
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-2.0-only
Not stated if an account is needed	Not stated if an account is needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 8, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.