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Intervals.icu vs FitTrackee: catalog facts
Intervals.icu	FitTrackee
Free Free to use.	Free Free and open source; you provide the server.
Web	Web, Self-hosted
Detailed fitness, fatigue and power curve analytics Separate zones and metrics per sport	Activity data stays on your own server Imports GPX files from most devices
Web only, requires an account Analytics depth can be a lot for casual users	Requires running and maintaining a server No phone recording app described in the research
Web application	Self-hosted
Closed source	Open source
License not stated	License not stated
Account needed	Not stated if an account is needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 23, 2026	Official website Full listing and sources Checked September 23, 2026

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