0-20 Pullups Back Trainer

Contains adsIn-app purchases
3.57K reviews
Content rating
Everyone
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.
Using a proven program, you'll be able to complete 20 pull-ups in just 6 weeks!
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

3.52K reviews
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
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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.
A Google user
April 10, 2020
You will occasionally reach sessions that you can't complete. Just redo that session the next time, or however many times it takes you to do it. Then you'll progress until you hit another one. But again, stay on that session until you conquer it. I find doing this MWF works best. Monday often is the breakthrough day after the 2 days off. This app has really helped me with significant muscle gains.
38 people found this review helpful
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Konrad
July 11, 2021
I like the design of the app, it's nice, easy to use. After 3 weeks of training I am developing tennis elbows, they are starting be painful. Increase in reps numbers is too steep, and if one needs to repeat almost every day at least twice, then the whole program would take much much longer than 6 weeks, assuming that progress is achievable and realistic.
17 people found this review helpful
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Zen Labs Fitness
September 2, 2021
Hi, we are always looking to improve the experience for our users, and really appreciate the feedback. If there is anything specific we can look into, please contact us at contactus@zenlabsfitness.com.

What’s new

- small optimizations and upgrades