■ 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 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
◉ 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!

≈ PRO Features ≈
◉ Apple Watch integration
◉ Calories and distance tracking

≈ 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 4.8.15

◎ Map History
◎ Zen Unlimited Pass update

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

4.5 out of 5
319 Ratings

319 Ratings

TestingPatience17 ,

Wouldn't use anything else

Great app! Ads don't interfere with functionality - easy to use - easy to integrate with social media and other apps. Records key data and super easy to repeat sessions if you're not ready to move up a level. Perfect for a beginner runner!

BurstingB ,

Fantastic app, never get shin splints! Just needs better Watch integration.

This app is the only way I can avoid going too hard too fast and getting shin splints after a long stint of not running.

That said, I would like the Apple Watch app to be better integrated. It might be an education issue or a software issue, but either way, the watch app seems kind of useless. The notifications to begin running/walking come through on the watch but don’t link through to the watch app. There seems no way to start a run via the watch app either. With the new watch recently released, I’d really like to see this integration happen, and (seeing as I’ve already bought the Pro app and there’s not a lot of other ways I could put my money where my mouth is) I would be willing to buy an in-app purchase to enable it.

Emily_aus8 ,

Ok but could be better

I’ve used a couple of C25K apps. This one looks nice but could do with a few improvements. Firstly while the interface is clean, a number of the metrics are too small to read such as “2 of 6” runs. Another improvement would be the voice telling you when you are starting the final run of the set as this brings some relief to know you are almost there.
The watch app is useless. A functional watch app that doesn’t require the phone would be beneficial as exercising was the main reason I got an Apple watch.
Notifications need some work. I did a run at 5:50am but got a notification at 9am suggesting I ‘dust off those running shoes”.
I still start an Workout on my watch at the same time as these app doesn’t work with the Apple Health or Activity app.


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Zen Labs LLC (CA)
182.6 MB

Requires iOS 10.0 and watchOS 3.0 or later. Compatible with iPhone, iPad and iPod touch.



Age Rating
This app may use your location even when it isn't open, which can decrease battery life.
In-App Purchases
  1. Zen Unlimited Pass Monthly $6.99
  2. Zen Power Playlist 3 Months $13.99
  3. Zen Unlimited Pass Annual $71.99


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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