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Intervals.icu vs RUNALYZE: catalog facts
Intervals.icu	RUNALYZE
Free Free to use.	Freemium Free account available, with a paid Premium tier.
Web	Web
Detailed fitness, fatigue and power curve analytics Separate zones and metrics per sport	Works with data from many device makers VO2max estimate and race predictions
Web only, requires an account Analytics depth can be a lot for casual users	Requires an account and upload of your data Some features are behind Premium
Web application	Hosted service
Closed source	Closed source
License not stated	License not stated
Account needed	Account needed
Needs internet	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.