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C25K vs Runna: catalog facts
C25K	Runna
Freemium Free on iOS and Android with optional paid features.	Paid Paid subscription with a free first week that can be cancelled at any time.
Android, iOS	Android, iOS
Simple eight-week plan aimed at beginners Audio coaching during workouts	Plans tailored to a specific race distance or time goal Covers goals from 5K to marathon
Focused only on reaching 5K Some features require payment	Requires a paid subscription after the trial week Closed source commercial service
Downloadable app	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.