I'll give you an example: now your technologically savvy and pathological jealous partner can open that file on your phone while you are sleeping and check where have you been in the past months, day by day.
Iphone users should be aware of that possibility.
EDIT: Actually, now that I looked at the software presented here, it doesn't even require access to the phone, just to the computer. Your partner can do this while you are at work.