FindMyDevice

The app Find My Device (FMD) is an open source alternative to the proprietary service offered by Google Google Find My Device.

To get help through SMS, send a message with:

fmd [PIN] help

The answer will be:

FindMyDevice Commands:

bluetooth - Toggle Bluetooth on and off
camera - Take a picture
delete - Factory-reset the device
gps - Toggle GPS on and off
locate - Locate the device
lock - Lock the device
nodisturb - Toggle Do Not Disturb on and off
ring - Make the device ring
stats - Get network statistics
help - Show the help

Google Find My Device

This is the official app provided by Android to access the object tracking service offered by Google.

You must enable this feature:

If the Use Find My Device is on, you can configure some important options about the usage of the FMD network. The FMD network is actually formed by all the Android devices where that feature is enabled; these devices can partecipate to the effort to locate other nearby devices, not only full-featured Android devices but also bluethoot trackers.

You determine how to partecipate to the FMD network, configuring the find your offline devices option: