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Half Marathon 13.1 Trainer

Half Marathon 13.1 Trainer

21K Run Walk Training by C25K®

5.6K ratings
181 reviews
With Ads
💪 Health & Fitness
⚽ Sports
Free
In-App PurchasesWith Ads

Details

  • Released
  • Updated
  • April 19, 2012
  • August 24, 2026

Features

Developer

Zen Labs
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iphone
ipad
🧾$0.99
In-App Purchase↘︎
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About

This app guides beginners through a 14-week program to train for a half marathon using a run-walk method. It offers audio coaching, progress tracking, and community support to help users complete their first 13.1-mile race.

✓14-week run-walk training program
✓Audio coach and alerts
✓Run mapping
✓Health app integration
✓Community forums
✓Music integration
Show original description

What users say

Summarized from real user reviews of Half Marathon 13.1 Trainer. Based on 5.6K reviews and a 4.7/5 average, it highlights the 5 positives and 4 negatives reviewers mention most about this Health & Fitness app.

Positive things

  • 👍Easy to use
  • 👍Helpful for beginners
  • 👍Great for training and motivation
  • 👍Integrates well with Apple Watch and Fitness
  • 👍Customizable music playback

Negative things

  • 🐛Occasional syncing and tracking issues
  • 🔋Drains battery life
  • 💰Subscription model change frustrates some users
  • 💰Paid app now requires subscription for full access
See all reviews
+1

What's New in Half Marathon 13.1 Trainer

6.5.31

August 24, 2026

◎ New Apple Watch App ◎ 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. contactus@zenlabsfitness.com

More

Subscription plans

Zen Unlimited Pass Monthly

Music, stats, & pro features in all our apps!

$4.991 Month
1 Month trial
How to cancel Half Marathon 13.1 Trainer subscription ⁉️
1

In-App Purchases

$0.99

Unlock Workout List

Unlock Workout List

User reviews

Most RecentHighest RatedLowest Rated

Love it

So easy to use
AlansoundzAlansoundz

Good program, but lacks appropriate reminders and cross training

I appreciate the running break down. It has kept me running steady. Some days I run and later on I get a push notification asking me to lace up my shoes- no! I ran already. As for cross training- I would like to be able to click as complete as it sounds pretty funny in a cross training class to have get ready to run said out loud from the online trainer. There are some bugs to work out.
Show more
ekolakowskiekolakowski

Response from developer

Hi, we'd be happy to assist you further with this. Kindly email our support team at contactus@zenlabsfitness.com with all the details. Hopefully we can earn a higher rating.

This app made me believe I can run!

I had never believed I could run, now I walk and run confidently. Thank you - the music helps too!
Rosabelle runsRosabelle runs

Such a great training app

Love the simple commentary and the clear plan.
MrsalinewmanMrsalinewman

Great app

Downloaded this years ago and I come back to it every time I fall out of shape. Easy to follow and good motivation.
lovetoplay410lovetoplay410
See 176 more reviews

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User experience

🐞

Reported Bugs

3 issues

App crashes or freezes during workouts

Bug

Inconsistent distance and time tracking

Bug

Syncing issues with Apple Watch

Bug
✨

Requested Features

4 requests

Option to view GPS route history

Feature

Ability to customize training days and schedule

Feature

Integration with more fitness tracking devices

Feature

Detailed performance metrics and analytics

Feature

FAQ

What is the Half Marathon 13.1 Trainer app?

This app provides a structured 14-week training program designed to help beginners complete a half marathon (13.1 miles or 21k). It utilizes a proven run-walk ratio to make training less grueling and reduce the risk of injury.

How does the run-walk method work?

The run-walk method involves alternating between periods of running and walking during your training sessions and the race itself. This approach helps manage fatigue, conserve energy, and build confidence for longer distances.

Is there a cost to use the app?

The app offers a free trial for the first week of training. After the trial, users can access additional features and content through an optional 'Zen Unlimited Pass' which offers subscription-based access to pro features across multiple running apps.

What devices is this app compatible with?

The app is compatible with iOS devices and integrates with the Health app. It is also featured on Fitbit and Samsung smartwatches, and offers iPad integration for indoor treadmills. The 'Zen Unlimited Pass' includes Apple Watch integration.

What are the main benefits of using this app for half marathon training?

The app's main benefits include a structured and easy-to-follow 14-week plan, audio coaching to guide your runs, the ability to map your runs, and access to a supportive community of other runners. The run-walk method is also beneficial for injury prevention and managing fatigue.