The AC-Finder App
The App marks the last position of your action cam on a map and also makes a loud sound so you know it immediately when you lose it. The position on the map is the position of your iPhone when the connection is lost. So you have a area to search for your lost cam. The App supports all action cams which have a wifi function AND have the feature to turn off the automatic standby. In the case the action cam goes into automatic standby you will have false positives in the alarms. Most vendors such as GoPro have this feature.
--> Link to App Store<--