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Xert vs Final Surge: catalog facts
Xert	Final Surge
Paid Paid service with a free 30-day trial.	Freemium Free training log with a paid Athlete Premium tier and paid coaching options.
Web	Android, iOS, Web
Estimates fitness without dedicated FTP tests Real-time feedback during training	Free training log for many endurance sports Syncs with Garmin Connect, Strava and TrainerRoad
Requires an account and a paid plan after the trial Proprietary hosted service	Premium features require a paid tier Closed source service
Web application	Downloadable app, Web application
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	Not stated if it works offline
Official website Full listing and sources Checked September 24, 2026	Official website Full listing and sources Checked September 23, 2026

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