■ 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 4.9.3

≈ NEW Achievements! ≈
◎ Track your progress and achievements across the Zen Labs network!
◎ More minor bug fixes and 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

4.7 out of 5
6.8K Ratings

6.8K Ratings

LeopardWarrior ,

I actually enjoy running now

The app is easy to use. And it's like having a friend and coach by your side. The workouts are challenging yet achievable, so I want to keep using it. Because of this app I now enjoy running, and I appreciate it very much.

I can echo the sentiments of the other reviewers, that the app keeps asking you to write a review even if you already wrote one.

I don't think the makers of this app actually read these reviews (I think the reviews are more or less for the purchasers of the app), so I'm going to see if I can contact them about this. I hope everybody else does too, if they haven't already done so. I think the app is good, and it can be better if we just let 'em know what the issues are.

sarahs3108 ,

Very buggy with iPhone 7+ and Apple Watch

I got this to use with my 7 plus and my Apple Watch. First, it keeps prompting me to turn on motion and fitness settings every time I open it, even though I've checked and double checked that it is, in fact, turned on. The most annoying part, though, is that I don't get audible notifications in my headphones when the phone is locked and in my pocket. I have to have it unlocked to get them. I've made sure my phone is not set to silent. And even if I turn off the auto-lock, it still sleeps in my pocket because of the light sensors. I don't remember having this problem on my previous phone, or with previous versions of the app.

Worse is the Apple Watch app. They take a long time to sync, and , most notably, if the app is running on my Apple Watch and my phone is in my pocket (how I ideally wanted to use it), I get nothing. Not a vibration, a sound, anything. I have to constantly check the timer while I'm running. The best solution I've found is to run the app on my phone, lock it and put it in my pocket, but NOT run it on my Watch. I will get push notifications on the Watch saying to run or walk. I don't, however, get to see the timer without pulling out my phone or opening the app no the Watch, which defeats the purpose.

2 stars because it does what it should IF you are willing to hold your phone unlocked for your entire run. Needs improvements. I'll be looking into other options.

Developer Response ,

Hello Sarah,

Please update to version 4.7. Looks like this review hasn't been updated since 2017. We've made a ton of optimizations and even added new features! We're sure you'll love it. C25K is a labor of love, so we hope you find these additional features useful. Please take a moment to update this review if you enjoy it. Thank you! :)

Cranky Rhino ,

Unhappy with nagging about location services

Up front, the workouts provided are good. Works well logging activity to Apple health. I feel like the interface could use work; most of the main UI is taken up by a stock photo that doesn't change, and you must scroll through your running data as it only displays one data point at a time (distance, time, etc.). Would be better to get rid of the photo and replace it with a map or an option to display all data points at once. My biggest gripe, however, is the nagging for always on location services even when not using the app. There is zero reason for this app to need anything beyond "allow while using," other than to collect data in the background for marketing. I get even owning a cell phone means the privacy cat is probably out of the bag, but I shouldn't have to put up with nagging from an app I paid for to needlessly provide it access to my location data in the background. You might as well stick with the free version, or find another app, if they're going to insist on collecting your data anyway.

Developer Response ,

We are sad to know that your experience with the app was not satisfactory. Please share your issue with us at and we will look into it at the earliest.


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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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