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Carb Manager vs OpenNutriTracker: catalog facts
Carb Manager	OpenNutriTracker
Freemium Free account available, with paid features on top.	Free Free and open source.
Android, iOS, Web	Android, iOS
Focused on keto and low-carb tracking Over 50,000 low-carb recipes	Open source calorie tracking Privacy-focused design
Less suited to diets that are not low-carb Closed-source service	Fewer features than large commercial food trackers Smaller food database than commercial services
Downloadable app, Web application	Downloadable app
Closed source	Open 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.