Half Marathon Trainer 13.1 21K v96.02
Zen Labs Fitness
About this app
Developer Description
Based on a run/walk program, this is the best beginners Half Marathon Trainer!
■ 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!
From the same makers of the #1 C25K Trainer app, Half Marathon Trainer follows the same successful recipe to create an easy simple 13.1 (21k) program, best suited for first-time half marathoners and those who are new to running. The program uses a blend of running and power walking in training and racing. You’ll soon be able to run-walk the entire half marathon.
≈ Free Trial ≈
◉ Train the first week for free!
≈ Real-Life Inspirational Transformations ≈
◎ Over 175,000 Likes and 1500 Success Photos at facebook.com/c25kfree
◎ Our community inspires one another (and inspires us!) everyday. Hear some of their amazing stories.
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★ This app will train you to complete a full 13.1 (26K) distance using a RUN/WALK strategy ★
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This proven 14 week plan is designed for true beginner/novice runners who want to train for a half marathon, but have very little running experience. This run/walk program is perfect for newcomers, as the walk breaks help mentally break up the race into segments, so you can focus on one section at a time. These breaks help make the half/full marathon less grueling, as well as reduces the overall impact and risk of injury.
But don't think that just because walking is involved that your time will be slower, or that you're accomplishing less. Many veteran runners have posted personal best times after switching to this run walk method! By using a ratio of running and walking, you can manage your fatigue which gives you the muscle resource and mental confidence to handle the later parts of the race.
Slowly build strength and stamina, and the blend of walking and running together reduces the overall impact and risk of injury. By the end of the program, you will be READY for your 13.1 (21k) race!
Turn on our award winning music and just press start! Our audio coach will guide you through your run! It's that easy!
★ Features ★
◉ Proven 14 week Half-marathon training run-walk program (1st week free)
◉ Convenient audio coach and alerts
◉ Map your run at the end of your workout!
◉ Light and dark modes
◉ 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 and distance stats
◉ Full access to C25K, 10K, 13.1, and 26.2 programs
◉ 4 apps for the price of 1!
★ Love this app? We have a complete suite of health and fitness apps that covers all your fitness needs.
7 Minute Workout - https://goo.gl/WQuX61
0-100 Pushups Trainer - https://goo.gl/IfCFCh
★ Connect
Facebook: @C25Kfree
Twitter: @C25Kfree
Instagram: @officialc25k
Hashtag: #C25K
★ The Forums are a great place to ask all your fitness questions!
http://forums.zenlabsfitness.com
Questions/comments regarding the app? Please email us at contactus@zenlabsfitness.com, or visit us at www.zenlabsfitness.com.
Legal Disclaimer
This app and any information given by it or by Zen Labs LLC are for educational purposes only. They are not intended nor implied to be a substitute for professional medical advice. You should always consult your healthcare provider before beginning any fitness program.
What's New
Proud partners with Google WearOS and Samsung to be the featured running trainer!
In-app purchases
$1.99 - $59.99 per item
Version Information
- Version
- 96.02
- Downloads
- 50K+
- Updated on
- Jan 12, 2026
- Released
- Mar 24, 2012
- Requires
- Android 7.0
Statistics
Google Play Rating History
Rating Distribution
Downloads Over Time
Half Marathon Trainer 13.1 21K has been downloaded times. Over the past 30 days, it averaged downloads per day.
Shaded area shows 30-day prediction based on historical trends
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Half Marathon Trainer 13.1 21K users say on Google Play
Nicole Pegram
Loved the app and used it for my first half marathon, but now that I got a new phone, they want to charge me a subscription fee after I purchased the app almost 2 years ago. Very disappointed. UPDATE: I emailed them to get this resolved as they recommended, and I did hear back right away. They were very kind and helpful are working to get this resolved. Will update again when resolved. UPDATE #2: Back to 5 stars. They sent me a code so that I could see every workout again! 😊
Jennifer P
Ok. It is functional however the tracker tracks me different mileage and different routes when I run the exact same route day after day. I doubt that the actual mileage is correct so I would not use it as a tracker for PR's by any means which sucks because runners want to know their times and mileage. I will look for a better ap.
Ryan Simon
Solid app so far, but frustrated with a few things. The app will sometimes get killed and lose my tracking progress. The biggest issue is that there's no watch support. It's weird because the C25K version of the app has watch support and this one doesn't. Please add watch support!
Mama Dianna Petrosky
I would give more stars cause I do love this app for training for the half marathon my sister and I run every year but super pissed now because I've used it no problem for the last 4 years and now its forcing me to pay a fee to go pro otherwise you can't go past the first week. Considering I paid for this app. Guess they want to lose customers now.
Lise Gabrielle
Runners beware. I did the c25k then 10k, then without reading the reviews downloaded this and started "training" for a half marathon. I assumed it would progress to actually get me to be able to run a half marathon. I'm now 5 weeks in and my endurance is completely diminished. I'll have to start over again with a 10k app and then move on to half marathon again (using an app that is NOT this one). I understand the concept of intervals, but I can feel my endurance and fitness diminishing. So sad.
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