A bit offtopic - if allowed:
One friend uses Android phone - and I wanted to install her one flashcard-program from the list above.
Without a account in google it was not possible - so I didnt think and put my one.
The programm was installed - but hanging up after first import via quizlet. We didnt know any way to get it working.
And - without any questions as well: All my emails were imported to her phone - and her contacts to my account.
Thats cool - But we didnt want it... When I remember well, the iOS is asking always for things like this.
And the app never made something like this.
How to say: She had to reset her phone - because she didnt find a way to delete my account...
I love iOS...
Andreas