0-20 Pullups Back Trainer

Using a proven program, you'll be able to complete 20 pull-ups in just 6 weeks!

Zen Labs Fitness · com.zenlabs.challenge.pullups

Not rated yet 100K+ downloads v6.8.0 87.5 MB Android 7.0+ PEGI 3 · Everyone

Download APK 87.5 MB All versions

Signature matches the Google Play version Details

At a glance

Latest version: v6.8.0 (283)
Updated: Jul 21, 2026 (3 months ago)
APK size: 87.5 MB
Requires: Android 7.0+ (API 24)
CPU support: x86 32-bit, x86 64-bit, ARM 32-bit, ARM 64-bit
Category: Health & Fitness (app)
Listed since: Nov 3, 2021 (at least)
Permissions: 20 (3 sensitive)
Website: zenlabsfitness.com
Developer contact: [email protected]
Privacy: Developer's privacy policy

About this APK

0-20 Pullups Back Trainer is an app by Zen Labs Fitness in the Health & Fitness category, listed since at least November 2021. 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 6.7.4, the minimum Android version rose from 5.0 to 7.0. It asks for 20 permissions, 3 of them sensitive: camera, read shared storage and modify shared storage. Compared with version 6.7.9, 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 v6.8.0

- small optimizations and upgrades

Description

From the listing uploaded by “appupdater”.

◎ Join the millions completing the Zen Challenge Series! ◎ 0 to 20 Pull-ups in 6 weeks! ◎ Featured on Glamour Magazine, Yahoo!’s Appolicious, Popsugar Fitness, Apple’s “What’s Hot”, Apple’s “New & Noteworthy”, and doctor recommended on healthTap! Are you ready for the 20 Pull-Ups Challenge? Train your upper body/core and build up to completing 20 pull-ups with same people that brought you the OFFICIAL #1 5K Training app C25K®. Using a proven program, the 20 Pull Ups Challenge slowly but surely builds and strengthens your upper body, having you perform specific reps of pull ups with a period of rest in between. Just simply follow and perform the instructed number of reps, and after 6 weeks, you will be able to do 20 pull ups straight! Can’t do a single pull up? No problem! The app has a built in program with detailed instructions on how to do what is known as a “negative pull up”. These negative pull up exercises will help you build enough strength until you can do a proper full pull up! Can’t physically finish a certain day’s workout? You can always repeat it until you’re ready to move on! Are the first couple weeks’ workouts too easy for you? The app allows you to skip ahead to any day you wish! ≈ It's easy and straight forward to start ≈ 1. Just open the app and start! 2. Listen to the voice cues! ★ Join the community for help, tips, and advice! http://www.facebook.com/zenlabsfitness http://twitter.com/zenlabsfitness ★ The Forums are a great place to ask all your fitness questions! http://forums.zenlabsfitness.com ★ Read our blog for great health tips! http://www.zenlabsfitness.com/blog/ Questions/comments regarding the app? Please email us at [email protected], or visit us at www.zenlabsfitness.com. Zen Labs is a proud supporter of the National Breast Cancer Coalition. We are passionate about finding a cure for breast cancer and proudly donate to their cause. www.breastcancerdeadline2020.org “Never doubt that a small group of thoughtful committed citizens can change the world. Indeed, it is the only thing that ever has.” ~ Margaret Mead 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 v6.7.4. Since v6.7.9 it requires Android 7.0+.

v6.8.0 LATEST Jul 21, 2026 87.5 MB TRUSTED v6.7.9 Jan 18, 2026 87.7 MB TRUSTED v6.7.7 Aug 27, 2025 89.6 MB TRUSTED v6.7.4 Jun 8, 2024 88.1 MB TRUSTED

All 4 versions

Security & authenticity

Security rating: Trusted

Signing certificate

Signature matches the Google Play version Checked by the source store on Jul 21, 2026.
Certificate issued to “Pullups Challenge” 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 Jul 21, 2026
Validated against Google Play Jul 21, 2026
Signed byCN=Pullups Challenge
Signing certificate (SHA-1)EA:23:08:DB:6B:AC:59:CD:83:22:7B:16:95:49:45:77:09:A1:B9:62
File MD5696bf68dd1407d05304775f2ddf61ff6
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 (20)

0-20 Pullups Back Trainer requests 20 permissions, 3 of them sensitive.

Camera Sensitive android.permission.CAMERA
Modify shared storage Sensitive android.permission.WRITE_EXTERNAL_STORAGE
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
Access adservices topics android.permission.ACCESS_ADSERVICES_TOPICS
Advertising ID com.google.android.gms.permission.AD_ID
Foreground service data sync android.permission.FOREGROUND_SERVICE_DATA_SYNC
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
In-app purchases (Google Play Billing) com.android.vending.BILLING
Internal broadcast protection (app-defined) com.zenlabs.challenge.pullups.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 foreground services android.permission.FOREGROUND_SERVICE
Show notifications android.permission.POST_NOTIFICATIONS
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
Portrait screen android.hardware.screen.portrait
Wi-Fi android.hardware.wifi

0-20 Pullups Back Trainer APK: questions and answers

Is there a version of 0-20 Pullups Back Trainer for older Android phones?

The current version needs Android 7.0 or later. Version 6.7.7 is the newest listed build that installs on Android 6.0 and later. Get version 6.7.7 · 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 0-20 Pullups Back Trainer free?

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

Is the 0-20 Pullups Back Trainer 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 696bf68dd1407d05304775f2ddf61ff6.