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VeloViewer vs Intervals.icu: catalog facts
VeloViewer	Intervals.icu
Freemium Free to start, with a paid PRO subscription for full features.	Free Free to use.
Web	Web
In-depth analysis of Strava activities Explorer tiles and route maps	Detailed fitness, fatigue and power curve analytics Separate zones and metrics per sport
Depends on a Strava account Full features need a PRO subscription	Web only, requires an account Analytics depth can be a lot for casual users
Web application	Web application
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 23, 2026

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