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HealthFit vs Intervals.icu: catalog facts
HealthFit	Intervals.icu
Paid Costs $6.99 on the App Store, with in-app purchases.	Free Free to use.
iOS	Web
Training load, fitness, fatigue and form metrics from Apple Health data Heart rate zones, year comparisons and training heat maps	Detailed fitness, fatigue and power curve analytics Separate zones and metrics per sport
Apple devices only; depends on Apple Health Paid upfront with additional in-app purchases	Web only, requires an account Analytics depth can be a lot for casual users
Downloadable app	Web application
Closed source	Closed source
License not stated	License not stated
No 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.