10K Trainer by C25K is an iPhone app designed to help beginners transform from couch potatoes to 10K distance runners in just 14 weeks. This app is developed by Zen Labs LLC CA and is available for free. It is the official 10K Trainer app and has millions of success stories. The app is an ideal choice for beginners and is one of the highest-rated health and fitness apps. It is featured on The New York Times, Los Angeles Times, The Washington Post, The Guardian, The Huffington Post, Men's Fitness, Forbes, Mashable, Glamour Magazine, Popsugar Fitness, CBS News, NBC News, Macworld, Cosmopolitan, Lifehacker, WebMD, and many more.

The 14-week program is designed to build strength and stamina by alternating between walking and running. The app's blend of walking and running reduces the overall impact and risk of injury, keeps your body guessing, and prepares you to go the distance. The audio coach guides you through your run, and the app's award-winning music will keep you motivated throughout your workout. The app is integrated with Facebook, Twitter, and Instagram, and you can join the community and meet other runners in the forums.