Some apps turns off automaticlly when using them, don't know what's wrong?

mate it is purely and simply a fail in the downloading and/or a glitch. Try redownloading the apps because this happenes to me if my internet cuts out half way through downloading , it starts again when its reconnected but it closes when i open, just redownload should help u.

Try here:

iOS: Troubleshooting applications purchased from the App Store

that happend to my ipod just exit oof the app an re click it and it should work xD good luck