Several problems with the program
First off you cannot invoke the task switcher when on this program Correction, task switcher does work when phone is in correct orientation. Secondly and more important it doesn't calculate scores correctly for the tenth frame. For example enter ten strikes seven miss for player 1. Then enter player 2 with ten strikes miss seven. Playe 2 shows a higher score than player 1 which is wrong. I didn't check other scoring scenarios, but if it can't calculate scores correctly it isn't worth having even if it was free.