APP ALWAYS CRASHES!

I love using my pay anywhere but I HATE using the app. Whenever I am trying to use it to check people out, it crashes. I try updating my inventory, it crashes. I go too fast switching between categories within the app, it crashes. It also isnt compatible with bluetooth keyboards because whenever I use mine for my iPad Mini, it immediately crashes the app. It doesnt matter which platform I use, the app doesnt work. They seriously need to figure this issue out or I will be switching card reader companies.

My Hami Vice about Payanywhere: Point of Sale POS, v4.5