■ The Official 10K Trainer app with millions of success stories!
■ Official partners and the ONLY C25K (Couch to 5K) app 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, Lifehacker, WebMD and many more!

"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

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

10K Trainer is the easiest program to get beginners from couch potatoes to 10K distance runners in just 14 weeks. By the same experts who created the #1 C25K® (Couch to 5K) training app!

Don’t worry, if you are already a 5K graduate, you can skip ahead and pick up where C25K® app leaves off!

This proven 14 week plan will allow users to slowly build strength and stamina by alternating between walking and running. The blend of walking and running together reduces the overall impact and risk of injury, keeps your body guessing, and prepares you to go the distance. By the end of the program, you will be stronger and healthier than you have ever been. You'll be a 10K runner!

Turn on our award winning music and just press start! Our audio coach will guide you through your run! It's that easy!

≈ Less is More ≈
◎ Easy to learn. Just press start!
◎ Ideal for beginners.
◎ 14 weeks total.

≈ Features ≈
◉ Easiest 10K program at only 3 times/week
◉ Convenient audio coach and alerts
◉ Map your run at the end of your workout!
◉ 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!

≈ PRO Features ≈
◉ Apple Watch integration
◉ Calories and distance tracking
◉ No ads

≈ 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
◉ Full access to C25K, 10K, 13.1, and 26.2 programs
◉ 4 apps for the price of 1! One subscription, multiple apps!

Questions/comments? Please email us at, or visit us at

≈ 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 6.3.24

◎ 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

4.6 out of 5
1.1K Ratings

1.1K Ratings

Shiouri ,

Good app!

I’m using 10K Trainer Pro because it has C25K and B210K together in one app so I’m not having to switch apps after I finish C25K and move onto B210K. I like this app a lot. I am almost done with week 4, and I’ve gone from not being able to run a mile to being able to run a mile in 10 minutes and 28 seconds. I look forward to being able to do a full 5K soon and then moving onto training to run 10K!

Almdoi Pad ,

No Stats, No Map, No Native Watch App, Poor Audio Cues

10K Trainer Pro is a disappointment. There are no section stat breakdowns, including pace. It does not support heart rate tracking. There is no map support to show a route I took on a particular day and no indication of change in elevation. There is no native Apple Watch application; I can't use this app and run without my iPhone. I cannot start my workout from the Apple Watch and if I have my Apple Watch alerts on, I do not get audio cues, even with my ringer turned on. I have previously used Bluefin's Ease Into 5K, which does not have Apple Watch support but does have all of the other features I would expect from a "Pro" application. Considering I have to run with my iPhone, I will probably go back to using a BlueFin application.

If all you want is cues for the time to switch from walk to run, get one of the free apps. There is no reason to pay for "Pro" when it has no pro features.

Developer Response ,

Hi, we've made a lot of awesome updates and even new features since 2017. Please update to the newest version 6.3.3. We've worked really hard and countless hours on bringing you our newest and biggest update with a refined UI. Pro features include distance, calories, and apple watch integration. We think you'll love it. If you find the new features useful, please take a moment to update this review. Every single piece of feedback helps us a ton. We hope you appreciate our hard work. Thanks :)

miller1231 ,

It works well.

I needed help getting back into running and this app helped me a lot. I do two runs a day, a Week 1 run to warm up and then a week 5, 6, or 7, run. I customize program to my ability and made it to week 12 but then had some personal stuff going on that stopped my running for a month or two. Getting back on program I didn’t want to restart so I’m doing a Week 1 run + Another Week 5 to 8 run back to back. It’s working great. This is a useful app if you want to get back into shape and don’t know where to start; however if you need to repeat weeks bc they’re too difficult then do so until your confident you can move on to the next week.


Zen Unlimited Pass Monthly
Music, stats, & pro features in all our apps!
Free Trial


Zen Labs LLC (CA)
182 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 $4.99
  2. Zen Unlimited Pass Annual $49.99
  3. Zen Power Playlist 3 Months $9.99


  • Family Sharing

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

More By This Developer

You May Also Like