I have a hard time doing 1 pull up, so I thought 0-20 pull-ups would be perfect. I bought the app and started it. They should have called it 2 - 20 pull-ups. It starts off on day 1 with you having to do 6 pull-ups with a 90 second rest after every 2.
I cant wait till I can do 2 pull-ups. Then I can maybe use the app.
Solesko about Pull ups: 20 pull-ups trainer, v6.30