Half Marathon Trainer 13.1 21K

Based on a run/walk program, this is the best beginners Half Marathon Trainer!

Zen Labs LLC · com.c13_1forpink2

4.7 out of 5 (3 ratings) 50K+ downloads v96.03 95.7 MB Android 7.0+ PEGI 3 · Everyone

Download APK 95.7 MB All versions

Signature matches the Google Play version Details

Watch the Half Marathon Trainer 13.1 21K trailer on YouTube

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At a glance

Latest version: v96.03 (216)
Updated: Jun 5, 2026 (4 months ago)
APK size: 95.7 MB
Requires: Android 7.0+ (API 24)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Graphics: OpenGL ES 2.0+
Category: Health & Fitness (app)
Permissions: 29 (5 sensitive)
Website: zenlabsfitness.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

Half Marathon Trainer 13.1 21K is an app by Zen Labs LLC in the Health & Fitness category. It includes native code for x86 32-bit, x86 64-bit, ARM 32-bit and ARM 64-bit, so it runs on practically every phone.

Since version 95.0, the minimum Android version rose from 4.4 to 7.0. It asks for 29 permissions, 5 of them sensitive, including precise location, location in the background and camera. Compared with version 96.02, it adds 1 new permission (“Foreground service data sync”) and drops 1 (“Read privileged phone state”). The app offers in-app purchases through Google Play and can read the advertising ID that ad and analytics services use.

What's new in v96.03

A bunch of new updates just in time for Summer! Lets smash some goals and reach new heights of health and happiness! Proud partners with Google WearOS and Samsung to be the featured running trainer!

Description

From the listing uploaded by “appupdater”.

■ The Official Half-Marathon Trainer App ■ 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. ===================================================== ★ This app will train you to complete a full 13.1 (26K) distance using a RUN/WALK strategy ★ ===================================================== 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 [email protected], 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.

Version history

4 versions are listed, going back to v95.0. Since v96.02 it requires Android 7.0+.

v96.03 LATEST Jun 5, 2026 95.7 MB TRUSTED v96.02 Dec 20, 2025 95.8 MB TRUSTED v96.00 Dec 11, 2024 88.1 MB TRUSTED v95.0 Sep 2, 2018 48 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jun 5, 2026.
Certificate issued to “Zenlabs LLC” This is the certificate of the Google Play version.
Same certificate as the 2 other versions checked

Store checks and file details

Developer signature verified Jun 5, 2026
Validated against Google Play Jun 5, 2026
Signed byCN=Michael Moon, O=Zenlabs LLC, C=US
Signing certificate (SHA-1)FB:EB:72:DB:71:F7:DE:5C:E8:E1:7F:1D:77:23:D5:44:A5:20:3A:E1
File MD54176603c8274bdc3413edc58ca949a76
Uploaded by “appupdater” Gold tier · 117,810 followers · uploading since 2020

Scans and ratings come from the source store; the certificate comparisons are AAPKs's own, made from the files' published signatures (2 other versions compared). AAPKs doesn't scan files itself — compare the MD5 and signer after downloading.

Permissions (29)

Half Marathon Trainer 13.1 21K requests 29 permissions, 5 of them sensitive.

Approximate location Sensitive android.permission.ACCESS_COARSE_LOCATION
Camera Sensitive android.permission.CAMERA
Location in the background Sensitive android.permission.ACCESS_BACKGROUND_LOCATION
Precise location Sensitive android.permission.ACCESS_FINE_LOCATION
Read shared storage Sensitive android.permission.READ_EXTERNAL_STORAGE
Access adservices ad id android.permission.ACCESS_ADSERVICES_AD_ID
Access adservices attribution android.permission.ACCESS_ADSERVICES_ATTRIBUTION
Advertising ID com.google.android.gms.permission.AD_ID
Badge read (custom) com.sec.android.provider.badge.permission.READ
Badge write (custom) com.sec.android.provider.badge.permission.WRITE
Control vibration android.permission.VIBRATE
Foreground service data sync android.permission.FOREGROUND_SERVICE_DATA_SYNC
Foreground service location android.permission.FOREGROUND_SERVICE_LOCATION
Foreground service media playback android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK
Full network access android.permission.INTERNET
Google Play install referrer com.google.android.finsky.permission.BIND_GET_INSTALL_REFERRER_SERVICE
High sampling rate sensors android.permission.HIGH_SAMPLING_RATE_SENSORS
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) com.c13_1forpink2.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION
Prevent the device from sleeping android.permission.WAKE_LOCK
Read Google service settings com.google.android.providers.gsf.permission.READ_GSERVICES
Receive push notifications com.google.android.c2dm.permission.RECEIVE
Run at startup android.permission.RECEIVE_BOOT_COMPLETED
Run foreground services android.permission.FOREGROUND_SERVICE
Schedule exact alarms android.permission.SCHEDULE_EXACT_ALARM
Show notifications android.permission.POST_NOTIFICATIONS
Storage android.permission.STORAGE
View Wi-Fi connections android.permission.ACCESS_WIFI_STATE
View network connections android.permission.ACCESS_NETWORK_STATE

Required hardware & features

Camera android.hardware.camera
Basic touch input android.hardware.faketouch
Location android.hardware.location
GPS android.hardware.location.gps
Portrait screen android.hardware.screen.portrait
Wi-Fi android.hardware.wifi

Half Marathon Trainer 13.1 21K APK: questions and answers

Is there a version of Half Marathon Trainer 13.1 21K for older Android phones?

The current version needs Android 7.0 or later. Version 96.00 is the newest listed build that installs on Android 6.0 and later. It is an old build: apps that rely on online services may no longer connect when they are this old. Get version 96.00 · All versions

Can I install this APK over the version I already have?

Yes, if your installed copy is older. It is signed like the Google Play version, so Android installs it as an update and keeps your data.

Is Half Marathon Trainer 13.1 21K free?

The APK is free to download, but the app offers in-app purchases through Google Play.

Is the Half Marathon Trainer 13.1 21K APK safe?

No one can promise that a file is safe, but some things can be checked. The source store rates this file Trusted. Its signature matches the Google Play version. It is signed with the same certificate as the 2 other versions checked. After downloading, check that the file's MD5 is 4176603c8274bdc3413edc58ca949a76.