I need help finding a phone tracking app that works on android and apple. Like find my friends
For 'Find my phone' you can use the free apps
Lookout (also a malware checker), and
AndroidLost (installable
after device was lost). etc.
For 'Find my friends' (a totally different beast) you can for instance use free
FourSquare or any of
dozens of different kinds of trackers.
As a rule the tracked party is supposed to have agreed to be tracked.
Glympse is a free tracking app I recommend because its tracking sessions are time limited.
Some navigation apps, like
Waze, have a built-in ETA/tracker.