iOS app constantly crashes.

it has to be at least six months now that I'm not been able to use the app. I will open it. I'll start a project five or 10 minutes and it'll crash. Don't reopen it. It will keep crashing over and over again. Till I forget about it and then weeks later, I try it again. The same thing happens. It is now unusable. This was my favorite application now I can't use it