With the BTX Defy Gravity Challenge you get a proven 30-day workout plan that introduces a NEW skill training every day along with the most effective workout routines. You only have to spend 30-45 minutes 4 times a week and get impressive results.

Not only will you get in the best shape of your life, but you will also become stronger and stronger while learning the steps to the advanced calisthenics moves (like muscle-up, front lever or planche). This is highly important for your motivation, because within the BarStarzz BTX program you just won’t get bored!

You will also have a personal progress dashboard that shows you exactly where you are and which achievements you’ve made. AND you will be part of a global community that supports you and pushes you harder than you ever could doing it all by yourself!

What’s New

Version 2.7.10


Ratings and Reviews

4.9 out of 5
76 Ratings

76 Ratings

Candlegit Zane ,

easy to use to track activity

Really enjoying this app. Looked for a while to increase change my workout from the starting strength/Texas method that is issued for 16 months and I stumbled you this one. I like how it automatically adjusts weight and reps based on previous workouts and combines focused exercises with compound exercises.

Budocenc zazsq12 ,

The app is great I recommend it to everyone.

Any program will take 6+ weeks to show results but I can definitely feel the light soreness from a hard workout, not that extreme soreness that last for 3-4 days. Really looking forward to seeing where I'll be in two months.

SPugsanayn (5789) ,

Clean and very practical, has all it needs to have.

I use it every workout and with the tracking ability and with the workout planner its invaluable. Sure there are a few things I'd change but overall its the best wendler program by far.


Independence284 GmbH
38.5 MB

Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating
In-App Purchases
  1. 4-Week Pre-Program for Complete Beginners $174.99
  2. BTX Muscle-Up & Body Transformation Bundle $94.99
  3. BTX Monthly Subscription $18.99


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

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