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Polar Flow vs COROS app: catalog facts
Polar Flow	COROS app
Free Free to use with Polar devices.	Free Free to download for COROS watch owners.
Android, iOS, Web	Android, iOS
Syncs data from Polar watches and heart-rate monitors Available on the web and on phones	Device management and data sync in one app Performance analytics from synced workouts
Only useful with Polar hardware Web service was under maintenance when checked	Only useful with a COROS watch
Downloadable app, Web application	Downloadable app
Closed source	Closed source
License not stated	License not stated
Not stated if an account is needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
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.