Fun fact: having systemwide location services on, even if you don't enable it for any apps, means that your location is sent in realtime to Apple/Google at all times (via Wi-Fi triangulation data). It's not just passive GPS reception.

If you want actual location privacy, you'll want to leave location services off systemwide on your smartphone, and consider getting an offline GPS receiver device. Good car satnav devices from China are like $60 now, and include continent-wide maps, though you lose realtime traffic info, being offline.