The app crashes for me on a daily basis. I have an iPhone7 not a plus. Running iOS12. I shut my screen off when I put my phone in my pocket during a set. When I turn the screen back on to log my weight lifted it will often freeze. I notice it has something to do with the keyboard. I am currently using the stock apple keyboard English. The keyboard number pad is blank when it freezes. I restart the app and tap to scheduled workouts to pick up where I left off.
Ditto that, right down to the phone model. Also freezing when using timer.