When I put my first quad (p3s) into the air for the first time, some time ago I was way more scared than I could possibly imagine I would. I didn't want to crash or loose the bird like the guys on the forums (I've noticed that those who **** up make a forum post, not those who don't. Explaining the amount of war stories here)
I figured to use GPS tracker and stick it on the phantom before flight. I love in iceland and not all things are available that close to the north pole. [emoji16] one of those unavailable things are those "mmini " gps trackers. And if I ordered I could have lost my drone while waiting for arrival of the tracker. So I had to think myself trough the problem and suddenly remembered that I bought a GPS watch for my son (kids tracker) before traveling to Spain few summers ago. That might work. So I took all parts of it that were not needed. Used double tape to mount it under the phantom and voila... It saved my *** few days later in a quite scary fly away.
Now it's on my mavic.
It has alot of functions like Geo fence and stuff but what I find useful about it is that I can :
-locate it
-Call it (if someone have it after finding it)
-My cell being called by one button press.
-make it play loud annoying sounds to find it in that places the GPS told you it was (sometimes that area is large enough to have to use sounds when finding)
-Alerts me by sms when : batt low, turned off, or removed from my drone.
(Provides gps location in these sms)
It has apps for both android and ios and has all settings changed from the app.
This works for me and only costs few dollars and have more function than many $100 trackers.
Here it is mounted on my mavics arse!