Won't Recognize When I Pull Up – Pull-Ups Workouts & Trainer Review

I use most of the runtastic apps, but this is the only one that gives me trouble. I do exactly as the instructions tell (put the phone upright in my pocket). Almost every time I use the app, it won't recognize when I pull up. I can't even get it to register when I wave the phone up and down in the same motion with my hand. It says I haven't done any pull ups even though I have done them all with proper form and full extension. If this app continues to not register, I'll have to go to another brand of pull up app that works properly.
Review by Solifugidman on Pull-Ups Workouts & Trainer.