0-20 Pullups Back Trainer

Contains adsIn-app purchases
4.7
3.54K reviews
100K+
Downloads
Content rating
Everyone
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About this app

◎ 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 contactus@zenlabsfitness.com, 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.
Updated on
Jan 12, 2026

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Financial info and 3 others
Data is encrypted in transit
You can request that data be deleted

Ratings and reviews

4.7
3.49K reviews
Aiden A.
January 9, 2026
using the latest version, when you switch between apps, during an active session, it loses progress and goes back to the beginning. This happens many times.
Did you find this helpful?
Zen Labs Fitness
January 9, 2026
Hi, can you please update to our latest release. Please contact us at contactus@zenlabsfitness.com if the issue persists. Thanks.
Courtney K
December 4, 2023
Disappointing for total beginners. The negative pull-up info wasn't immediately apparent since I didn't look around much after realizing this was just a tracker to increase # of pull-ups rather than a variety of arm and shoulder exercises to increase pull-up ability. Maybe I'm mistaken and not the target user (but it's called 0-20 pull-ups in the app store)! I really didn't progress from 0 without including other dumbbell exercises and assisted pull-ups.
10 people found this review helpful
Did you find this helpful?
Zen Labs Fitness
December 7, 2023
Thank you for taking the time to share your feedback! We deeply respect your advice, and we will try to combine your feedback with our R&D, in order to provide better products. If you have any other suggestions, feel free to share with us at contactus@zenlabsfitness.com.
Edward Hart
December 17, 2025
No complaints. Pull-ups are getting easier using the app program.
1 person found this review helpful
Did you find this helpful?
Zen Labs Fitness
December 18, 2025
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!

What’s new

- small optimizations and upgrades