Enhance your strength, endurance, and stamina, train for your 21k run with the best half marathon training app! 21K Run Trainer will help you become the runner you’ve always wanted to be! This is the easiest, most comprehensive and most successful half marathon training plan for you to train for your first 21K.

Our 12 week half marathon training plan will literally take you to the finish line of your first 21k run. 21K Run Trainer is a simple and powerful 1/2 marathon training app that will guide you through the whole journey with encouragement, useful tips, step- by- step interval planning, and so much more. Complete your half marathon by using the run/walk strategy and get the advice you need!

This half marathon training program starts off easy and slowly increases the runs. The real fascination of this 12 week half marathon training and running app is that it keeps you motivated and encouraged all the time. Keep your inner self in tune with your body by listening to audio coach guidance, read daily motivational quotes and enjoy great half marathon training plan!

Not only that you will get the motivation and information you need by using this incredible half marathon training program, but you will also be able to enjoy your favorite tracks while running and training! The running app features a built-in music player that lets you listen to your music during exercises. The audio coach gently blends in when needed, plus you get intuitive on-screen controls that make the experience even better.

Experience the pure enjoyment of running by having the best half marathon training app! If you need a half marathon training guide to reach your 21K goals easily, then 21K Run Trainer is exactly what you need. The app keeps track of your runs and achievements, it awards you with badges and gives you the opportunity to share your progress with your friends and family on any social media. Share your 12 weeks half marathon training log by Facebook, Twitter, or email, and don’t forget to invite your friends to join you!

- Reach your 21k run goals in 12 weeks
- Follow detailed half marathon training schedule
- Uses alternating walks & runs
- Audio coach to guide & motivate you
- Repeat workouts whenever you want
- Includes a music player to listen to music while exercising
- Built-in GPS & distance tracking
- Receive cool badges for your progress
- Tracks & logs each time you do a new run
- Share achievements with friends
- Fully customizable settings
- Supports both phone & tablet devices
- Smooth on-screen controls
- FREE to use half marathon training plan app

How to train for a half marathon and fully enjoy it?
It’s simple!

Get 21K Run Trainer for FREE today and just believe in yourself!

Please seek medical advice prior to commencement.

Choose to upgrade to a Premium Membership, payment will be charged to your iTunes account at confirmation of purchase. Your weekly subscription is 2.99 USD per week after a 3-day free trial. Your subscription renews automatically unless canceled at least 24 hours prior to the end of the current period and cancellation of the current active subscription period is not allowed. By subscribing you get unlimited access and unlock all Training program, Transformation tracker, Diet recipes & 30 Day meal plan.

Auto-renewal may be turned off in your Account Settings in iTunes after purchase. You can also manage your subscriptions in Account Settings after purchase.

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Ratings and Reviews

Needs help


I don’t like that you can’t set your race date to customize the training program to a shorter training period.


Rumble Enterprise
33.6 MB
Health & Fitness
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
English, Spanish
Age Rating
Rated 12+ for the following:
Infrequent/Mild Medical/Treatment Information
This app may use your location even when it isn't open, which can decrease battery life.
© Rumble Enterprise
In-App Purchases
  1. 21K Run Trainer (Weekly) $2.99


  • Family Sharing

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

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