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OpenTracks vs AAT Another Activity Tracker: catalog facts
OpenTracks	AAT Another Activity Tracker
Free Free and open source.	Free Free and open source under the GPL-3.0.
Android	Android
Records GPS tracks for runs, rides and hikes Supports Bluetooth Low Energy heart rate sensors	Stores tracks as standard GPX files Offline maps, hill shading and offline POIs
Android only No hosted sync or social features	Interface is utilitarian compared with commercial trackers Offline maps must be downloaded separately
Downloadable app	Downloadable app
Open source	Open source
License not stated	License: GPL-3.0
Not stated if an account is needed	No account needed
Works offline	Works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked October 2, 2026

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