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

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