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AAT Another Activity Tracker vs Trackbook: catalog facts
AAT Another Activity Tracker	Trackbook
Free Free and open source under the GPL-3.0.	Free Free and open source under the MIT licence.
Android	Android
Stores tracks as standard GPX files Offline maps, hill shading and offline POIs	Simple start-and-record workflow Uses OpenStreetMap map data
Interface is utilitarian compared with commercial trackers Offline maps must be downloaded separately	Bare-bones by design, without training plans or detailed fitness analysis Android only
Downloadable app	Downloadable app
Open source	Open source
License: GPL-3.0	License: MIT
No account needed	Not stated if an account is needed
Works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

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