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Final Surge vs Intervals.icu: catalog facts
Final Surge	Intervals.icu
Freemium Free training log with a paid Athlete Premium tier and paid coaching options.	Free Free to use.
Android, iOS, Web	Web
Free training log for many endurance sports Syncs with Garmin Connect, Strava and TrainerRoad	Detailed fitness, fatigue and power curve analytics Separate zones and metrics per sport
Premium features require a paid tier Closed source service	Web only, requires an account Analytics depth can be a lot for casual users
Downloadable app, Web application	Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Not stated if it works offline	Needs internet
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.