I refuse to install Google Maps on iOS, because every time I've installed it on our FAMILY iPad, it keeps driving the user to sign in with MY account, which it appears to have weaseled out of the sandboxed Google+ for iOS. Sorry, but firstly I don't want to have a search history. Secondly I don't want the search history of the rest of family to be linked to my Google account.
I understand that some people might want to switch this on as a feature, byt I don't, and Google have designed the app, so that it seems like it won't work without signing in. A very dark UI pattern if you ask me. This whole assumption of one-device-one-person is naive.