The "Find my phone" works with all Apple devices and you can find IPads, IPhone, Macbooks and I Phone Touch, basically anything that is connected to a WiFi or internet Source.
There are also many apps for tracking people / phones.
My wife and I work in the NHS so late finishes are a daily occurrence. We simply check where the other one is when we leave and the one closest to home does the shopping!
Alternatively as we both hit Fareham, we can meet up for supper if we both finish really late, so it works well for both of us.
Android has
Life 360 and Apple has
Find my Friends
I use both as I have a Galaxy Dual Sim and an Iphone, but Life 360 can work on both.
I am not entirely comfortable with the promotion of Life 360 with some of the scare tactics, but it has more features than the Apple app, including a "Panic" option which will text / email / ring allocated Family members
From a Privacy point of view all the systems require consent. You have to request access and this needs o be accepted before the person is added to the app