Half Marathon Trainer 13.1 21K

Health & Fitness

★★★★★★ 4.7

Installs

50,000+

Price

Free

Developers

Zen Labs Fitness

Content Rating

Everyone

Android Version

7.0

Version

96.02

Half Marathon Trainer 13.1 21K APP Review

Experience the journey of a lifetime with Half Marathon Trainer 13.1 21K, the official app designed for those new to running. This application has gained recognition from prestigious publications like The New York Times and Men's Fitness, making it a trusted choice for beginners. Whether you're preparing for your first half marathon or just looking to increase your fitness level, this app provides a structured 14-week training program combining running and power walking.

The app is equipped with an easy-to-follow run/walk strategy, breaking down the long-distance challenge into manageable segments. Each session is guided by a friendly audio coach, ensuring you remain motivated throughout your journey. Plus, you can enjoy custom music to keep your energy levels up during your workouts!

Join a thriving community of over 175,000 fellow users who share their inspiring progress and support one another. Stay connected via social media and forums to exchange tips, advice, and encouragement. With new features like Zen Unlimited Pass, enjoy enhanced musical motivation and access to even more training programs alongside this app.

HALF MARATHON TRAINER 13.1 21K is not just about training; it’s about building confidence and achieving your goals. Suitable for all fitness levels, you can easily tailor your workouts to fit your schedule. Overall, this app offers a comprehensive and supportive running experience, perfect for anyone looking to conquer their first half marathon.

User Reviews from Google Play Store

Cortney Badenhop

Jan 14, 2026

★★★★★(1)

I bought this app because I used the free 5k one when I first started running and loved how the app worked. This one doesn't disappoint either -- until you get a new phone and they want to charge you all over again :(

Version: 96.02

Developer Response

Hi, can you please contact us at contactus@zenlabsfitness.com with a screenshot of your receipt and we will gladly help you in resolving the issue.

Luanne MacIsaac

Jan 6, 2026

★★★★★(5)

First time using app. so far so good. like the narrative

Version: 96.02

Developer Response

We are pleased that you enjoyed the app! If there is anything we can do for you, just let us know at contactus@zenlabsfitness.com. Have a wonderful day!

Alena Piskova

Jan 4, 2026

★★★★★(5)

i need to achieve 21 km marathon in 11 weeks . so I'll try it

Version: 96.02

Developer Response

Thank you for taking the time to share your feedback! As we would like to see more of your journey, be sure to share with us on social media via Facebook and Instagram. If there is anything we can do, let us know at contactus@zenlabsfitness.com.

Sarah Preston

Jan 4, 2026

★★★★★(5)

I COMPLETED THE C25K SO THIS IS THE NEXT CHAPTER FOR ME (THERE IS ALSO A 10K YOU CAN DO BEFORE TOU GET HERE AND A FULL MARATHON AFTER). IT SETS YOU IN MOTION TO COMPLETE YOUR GOAL IN MANAGEABLE INCREMENTS. I HAD NEVER RUN A DAY IN MY LIFE AND THOUGJT I NEVER WOULD. ONE DAY I WAS TALKING TO SOMEONE AND DECIDED TO GIVE IT A SHOT. I AM NOT FAST. I WILL NOT WIN A RACE. BUT IN THE END, IT DOESN'T MATTER HOW FAST YOU GO, THE DESTINATION IS ALL THE SAME. YOU CAN DO IT!

Version: 96.02

Developer Response

Congratulations on completing the C25k app! We are thrilled to be a part of this journey, be sure to share with us on social media via Facebook and Instagram! If there is anything we can do for you, just let us know at contactus@zenlabsfitness.com. Have a wonderful day!