■ The OFFICIAL C25K® (Couch to 5K) program with millions of success stories!
■ Official partners and featured on FITBIT and SAMSUNG smart watches!
■ 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, The Verge, Lifehacker, WebMD and many more!

"C25K is easy to use, as you would hope for a beginner app." - New York Times

"Daily programs that alternate between short bursts of walking and running until you're ready to go the distance." - Forbes

"One of the highest-rated health and fitness apps... A modest, realistic workout schedule." - Men's Fitness

Our community is our priority. Questions? Comments? Suggestions? See why our community has made us the #1 5K training app.

≈ Real-Life Inspirational Transformations ≈
◎ Over 175,000 Likes and 1500 Success Photos at
◎ Our community inspires one another (and inspires us!) everyday. Hear their amazing stories.

"In this last year I have lost 97 lbs, gotten off insulin and 9 other medications, completed the C25K running app and started the 10k app. Life is a blessing." - Diana

“I went from a size 16 to a size 7. I tell anyone I can about the app. because it was nothing short of a life changer.” - Amber

"I'm now down 50 pounds from when I began C25K in August. I've gone through the program 3 times increasing my speed by a half MPH each time." - Claire

C25K® is the easiest program to get beginners from couch potatoes to 5K distance runners in 8 weeks.

The proven C25K program was designed for inexperienced runners who are just beginning. The plan's structure prevents new runners from giving up and challenges them to continue moving forward. C25K works because it starts with a mix of running and walking, gradually building up strength and stamina.

≈ Less is More ≈
◎ Easy to learn. Just press start!
◎ Ideal for first-time runners
◎ 30 minutes a day, 3 days a week, 8 weeks total. Millions have finished their first 5K. You will too!

≈ Features ≈
◉ Convenient audio coach and alerts
◉ Map your run at the end of your workout!
◉ Exclusive partners with MyFitnessPal!
◉ Light and dark modes
◉ Health app integration
◉ Free iPad integration for indoor treadmills
◉ Listen to your own favorite music and playlists while you train
◉ Integrated with Facebook, Twitter, and Instagram
◉ Access to our forums with thousands of veterans and newcomers starting the app. Join the community and meet other runners!

≈ NEW Zen Unlimited Pass - Try it for free! ≈
◉ Award winning music curated from top DJ's!
◉ Scientifically proven to increase motivation by 35%
◉ Unlimited access to all pro features across ALL Zen Labs Fitness running apps
◉ Unlock calories, distance, Apple watch integration, and more
◉ Full access to C25K, 10K, 13.1, and 26.2 programs
◉ 4 apps for the price of 1! One subscription, multiple apps!

≈ Connect ≈
Facebook: @C25Kfree
Twitter: @C25Kfree
Instagram: @officialc25k
Hashtag: #C25K

Zen Labs is a proud supporter of the National Breast Cancer Coalition.

Subscription pricing and terms:

The subscription will automatically renew unless turned off in your iTunes Account Settings at least 24 hours before current period ends. You can go to your iTunes Account settings to manage your subscription and turn off auto-renew. Your iTunes Account will be charged when the purchase is confirmed. If you subscribe before your free trial ends, the rest of your free trial period will be forfeited as soon as your purchase is confirmed.

Privacy Policy & Terms of Use:

Legal Disclaimer

This app and any information given by it or by Zen Labs LLC are for educational purposes only. You should always consult your healthcare provider before beginning any fitness program.

C25K® is a registered trademark of Zen Labs LLC

What’s New

Version 5.0.23

≈ Quality of Life Improvements! ≈
◎ New widgets!
◎ Apple Watch bug reporting and syncing optimization

Our community is our number one priority. We answer each and every email. Most of our updates have been suggestions from our community. Questions? Comments? Suggestions? See why our community has made us the #1 5K training app.

Ratings and Reviews

4.8 out of 5
117.1K Ratings

117.1K Ratings

JuliaJoyJackson ,


I’ve wanted to get in shape for years but was convinced that I should resign myself to just being frumpy. When one of my kids joined track, I remembered how much I loved track when I was the same age. (At all other ages before and after I didn’t like running though lol) I’ve made small efforts here and there to adjust my lifestyle so that I could be healthier for myself and my family. Fear of actually winding up overweight and frumpy for the rest of my life, and fear that I’d never get energy back, be at a healthy weight, or see my actual knees and have real calves again, led me to decide to use the C25K program. I was surprised how many people hadn’t heard of the program, but I’ve been sharing it through social media and through word of mouth whenever I finish a session. The app makes it easy to share to social media so that my friends and family can cheer me on and keep me accountable, while giving me pride in seeing what I’ve accomplished. There’s a community area of other people using the program, and even a place on the app to locate local 5K runs to sign up for so you have a goal to push towards! I’m excited about continuing my journey, and happily surprised at how easy it is. I recommend setting up a playlist on your music since the app chooses the same series of songs otherwise. Just trust yourself to get the first few steps out of the door and let the app do the rest! HAPPY RUNNING!

gopipsqueaky ,

Shhh...just trust the app

Ok so I have always hated running and running for even a minute straight was tough. I laughed when I saw some of the workouts through out the weeks on running 5 minutes straight? Several times a workout?? Hah! Well after reading the other reviews and people with similar background having success I gave it a try. It’s like the app puts a finger up to your lips and says “Shhh...just trust me.” You nod your head in silence and reluctantly jump on board. Some how, some way, you get through the workouts. Each week they get a little harder, but somehow you find yourself being able to sustain longer run times. You can’t believe it, it seems too good to be true. But you just don’t think about it and keep going. Because in the back of your mind you are afraid if you do think about it you’ll wake up and it won’t be true. Next thing you know you are running for the longest you’ve ever run in your life!! It’s a miracle! You feel great and your confidence is through the roof! Then it asks you if you want to start training for a 10k. And the panic and self doubt sets in all over. But it works!

Daalgrim ,

Back into shape and an active life

I used to be an avid runner- my Mile was down to 4:50 pace. As you get older, muscles and dynamics change especially if one does not keep up with fitness. I was trying to get back down to 6min but was going about it the wrong way with a slow jog and getting mileage in. It was frustrating and would take a lot of time just to run. I couldn’t keep at it because I also had this sore on the side of my knee. Come to find out I was going about my run all wrong because of my defeated mentality.
This app has changed all that. The mixture of walking and jogging encourages a faster pace and to kick up your knees. The reason; because it’s only 30 min- it’s like that carrot dangling to encourage one to run harder and correctly to build not only calve and thigh muscles, but also the glutes. I cannot emphasize enough on how this app encourages kicking up my knees and picking up my pace during the running portion, thus targets the correct muscles and taking pressure off my knees. Because of all those factors, I can remain consistent and actually look forward to it. I still don’t like running- but 30 min isn’t that long and is a nice escape either with music or talk radio. The best part- being active helps me keep up with my son when I’m playing with him. Just 30 min of my own three days a week- enables me to go the extra mile with my son after a difficult day at work.


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App Privacy

The developer, Zen Labs, 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 Used to Track You

The following data may be used to track you across apps and websites owned by other companies:

  • Location

Data Not Linked to You

The following data may be collected but it is not linked to your identity:

  • Health & Fitness
  • Location
  • Contact Info
  • Identifiers
  • Usage Data
  • Diagnostics

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


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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