C2K — Couch to 5K & 10K

Open-source C25K trainer

Only for iPhone

Free · Designed for iPhone. Not verified for macOS.

iPhone

Free, open-source running trainer for iOS. No account, no subscription, no ads, no tracking. C2K is a free, open-source running trainer for iOS that guides you from the couch to running 5K, 10K, and beyond — with no ads and no tracking. Programs: • Pre-C25K — 3-week gentle starter for absolute beginners • Couch to 5K (C25K) — 9-week program, 3 runs per week • Bridge to 10K (B210K) — 6-week bridge for C25K graduates • Couch to 10K (C210K) — 14-week program, continues from C25K • One Hour Runner — 13-week progression from 30 to 60 minutes continuous running • 5K Improver — 8-week speed and stamina program for runners who can already complete 5K Features: • Audible voice prompts — "Start running", "Walk for 90 seconds", countdown warnings • Customizable coaching — adjust voice speed/volume, countdown warning timing, and mid-interval cues • Vibration cues as an alternative or addition to voice • Background workout timer — continues with the screen off • Lock screen controls — see interval progress and pause/resume from the lock screen or Control Center • GPS tracking (optional) — records distance and pace; works without GPS too • Treadmill mode — indoor runs without GPS • Workout history — session log with total distance, time, best pace, longest run, and calorie estimates • Progress tracking — remembers which weeks and days you've completed, with the option to reset • In-app running guide — FAQ covering pacing, gear, and terminology • Available in 7 languages — English, German, Spanish, French, Galician, Portuguese (Brazil), Russian • Works entirely offline — no data ever leaves your device C2K is free software released under the GNU General Public License v3.

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The developer, Mathew Brown, indicated that the app’s privacy practices may include handling of data as described below. For more information, see the developer’s privacy policy .

  • Data Not Collected

    The developer does not collect any data from this app.

    Privacy practices may vary, for example, based on the features you use or your age. Learn More

    Accessibility

    The developer has not yet indicated which accessibility features this app supports. Learn More

    Information

    Seller
    • Mathew Brown
    Size
    • 1.1 MB
    Category
    • Health & Fitness
    Compatibility
    Requires iOS 17.0 or later.
    • iPhone
      Requires iOS 17.0 or later.
    • Mac
      Requires macOS 14.0 or later and a Mac with Apple M1 chip or later.
    • Apple Vision
      Requires visionOS 1.0 or later.
    Location
    • This app may use your location even when it isn’t open, which can decrease device battery life.
    Languages
    English and 6 more
    • English, French, Galician, German, Portuguese, Russian, Spanish
    Age Rating
    9+
    Copyright
    • © 2026 Matt Brown
  • Privacy Policy

    • More by Mathew Brown