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Final Surge vs Xert: catalog facts
Final Surge	Xert
Freemium Free training log with a paid Athlete Premium tier and paid coaching options.	Paid Paid service with a free 30-day trial.
Android, iOS, Web	Web
Free training log for many endurance sports Syncs with Garmin Connect, Strava and TrainerRoad	Estimates fitness without dedicated FTP tests Real-time feedback during training
Premium features require a paid tier Closed source service	Requires an account and a paid plan after the trial Proprietary hosted service
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 24, 2026

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