- The OFFICIAL C25K® (Couch to 5K) program.
- Millions of success stories!
- 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, Fox News, Macworld 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 150,000 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 an exercise routine. The plan's structure prevents new runners from giving up and at the same time 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 ≈
◉ BRAND NEW MUSIC curated from top DJ's, built right into the app (subscription)! Scientifically proven to increase motivation by 35%
◉ Track your calories and distance for each workout! Tap the center dial to cycle through your stats! (Pro version)
◉ Exclusive partners with MyFitnessPal!
◉ New skins! Customize the look of your app
◉ Listen to your own favorite music and playlists while you train
◉ Convenient audio coach and alerts
◉ Integrated with Facebook, Twitter, and Instagram
◉ Convenient access to our forums with thousands of veterans and newcomers starting the app. Join the community and meet other runners!
◉ The only C25K app that works accurately while your device is locked!
◉ Free iPad integration for indoor treadmills

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

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

Zen Power Playlist auto-renewing subscription:
- 1 Month: $4.99
- 1 Year: $49.99

– Payment will be charged to iTunes Account
– Subscription automatically renews unless auto-renew is turned off at least 24-hours before the end of the current period
– Account will be charged for renewal within 24-hours prior to the end of the current period, and identify the cost of the renewal
– Subscriptions may be managed by the user and auto-renewal may be turned off by going to the user's Account Settings after purchase
– Privacy Policy & Terms of Use:
– Any unused portion of a free trial period, if offered, will be forfeited when the user purchases a subscription to that publication, where applicable

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 4.9.2

◎ Tweaks, updates, and goodies

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

7.7K Ratings

7.7K Ratings

Great for beginners!

Mishi 8402

I've never jogged in my life and I had poor cardio endurance. I had never jogged more then a minute and a half, even that was a struggle. I am a physical therapist assistant so I know a little about exercise. I believe this app has helped me lower my hate rate and build up endurance. I thought I would drop back a day or two because of the lack of confidence and faith in workout apps, but this app was perfect. I haven't repeated one day yet. I can tell they did a lot of research and put forth a lot of knowledge to prepare this app for anyone. I'm not a person who gives many apps 5 stars. I only thought of one thing I would change in this app. The way the music is set up. I am on my fifth week and excited to run my first 5k in July. I believe I am a healthier person and I'm excited the designers of this app have done an exceptional job in creating a way to make it easy to be healthier. All you need is motivation and drive and you can succeed!!! Good luck!

Got me running again after 10 years!


I was a competitive runner in high school but after a couple of injuries in high school and college I stopped working out consistently. This past winter a friend suggested we run a 5k together. I had been wanting to try running again and this seemed like the perfect opportunity plus I had someone to hold me accountable. It has taken me longer than the plan laid out in the app but that was by choice. I figured if I came back slowly this new habit would be more likely to stick. Every time I run it gets a little easier and I get more confident. This weekend I will be running my 3rd 5k for the year. I'm not sure I would've gotten to this point without the app. Thank you!

My only suggestion for improvement would be to allow me to lock my phone while the app is on. I found that if I lock my phone and allow my screen to go black the app will stop speaking. Other than that everything works great!

Awesome Trainer!


Just completed my first week and I'm on top of the world! C25K is so user friendly and gives me the confidence and guidance I need to be successful. The goal actually feels attainable.

I love especially the ability to sync with your music on iTunes and this app called RockMyRun that adjusts the tempo of the music based on your strut or even your BPM or Heart Rate. It also syncs with my Apple Watch which is quite handy and allows me to just feel and see when I need to switch to walking from running and vice versa as opposed to solely audio cues through my headset, which I have found that I'm not always alerted, one of the reasons I gave the app 4 stars.

I also gave the app 4 stars because if I happen to go into the forum, there seems to be no way of exiting back out to the main area of the app for training without quitting the app and reopening. But other than the quirks I mentioned that need to be fixed, this is an awesome trainer overall!


Zen Labs LLC (CA)
118.8 MB
Health & Fitness
Requires iOS 10.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
This app may use your location even when it isn't open, which can decrease battery life.
© 2018 Zen Labs Fitness
In-App Purchases
  1. Remove Ads $1.99
  2. Go To Pro $4.99
  3. Zen Power Playlist 1 Month $4.99


  • Family Sharing

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

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