Do you think that only in iOS there is a location logging system through which iDevice owners circulate? If so, then you would be wrong because Google has implemented a similar system in Android OS, system discovery after Locatiogate had so much media coverage on the internet. Unlike iOS, where the file with data on user locations is synchronized with iTunes, in Android OS you need a rooted terminal (jailbroken) to access this data.
At Google, the entire system offers much better protection for users, but the main idea is that the terminal logs the data regarding the user's location. When an Android application requests location data on the map, the terminal sends the location data to Google and Google sends back a response that is recorded by the application. This back-and-forth is more than likely saved on Google's servers, which has a fairly large record of how the owners of Android terminals circulate.
The good part about the Android system is that once every 12/48 hours the entries in the file are reset or the reset is done even faster if the limit of 13.000 entries is reached in the file. In practice, only very recent information will be found in the Android smartphone, the rest being automatically deleted. In iOS, unfortunately, there is a very large log with information and for now Apple has to explain to the authorities why it does everything it does.
