App crashes when opened

Whenever I open minecraft it goes to the red mojang screen then completely shuts off back to my Home Screen. This has been an on going issue for 10 months now. I have searched through here and other website back can seem to find a resolution. In my files on my iPhone the minecraft file doesn’t have anything in it. Is that an issue? Hope this can be fixed as it has been just about a year and I had only just bought it.