GPS Trackers
AirTag for Android: what works, what does not, and what to do if you find one
An Android phone cannot add or locate an AirTag, but it can warn you about one and read it by NFC. This guide covers what Apple and Google…
Latest dossier · Hidden Cameras & Nanny Cams · 6 min read
Hidden camera apps: what your phone’s sensors can actually detect
A phone's own hardware can sense far less than hidden camera app listings suggest. Here is what the magnetometer, Wi-Fi radio and time-of-flight sensor can and cannot do, based on developer docs…
Open the full case file 
GPS Trackers
Samsung Find My Device and Google Find Hub: what the names mean and how to set up
Google renamed Find My Device to Find Hub, and Samsung runs its own locator. Here is how the two differ, how to switch Find Hub on, and what…
Counter-Surveillance & Privacy Law
How to tell if your phone is being tracked, and what to do first
Phone stalkerware is built to hide, and removing it can alert the person watching you. Here are the signs, the checks, and the order to do things in.
GPS Trackers
Samsung SmartTag2 vs Apple AirTag: specs side by side
The Galaxy SmartTag2 and the AirTag share a battery type and an IP67 rating, but each works with its own maker's phones. Here are the specs both companies…
GPS Trackers
Apple AirTag for luggage: airline sharing and what the FAA says
Apple lets you share a lost bag's AirTag location with a partner airline, but the location is approximate and the FAA tells travelers to check with the airline.
GPS Trackers
How to reset an AirTag, and what to do if it is locked to someone else
Apple's battery routine resets an AirTag in five rounds, but a locked tag still needs the previous owner. Here is what each step does and where it stops.
GPS Trackers
Does an AirTag need to be charged? Battery life and alerts
An AirTag runs on a replaceable CR2032 coin cell, not a charger. Here is what Apple says about battery life, the low battery alert and the second generation.
GPS Trackers
How to change an AirTag battery, step by step
Changing an AirTag battery takes five steps and no tools. Here is Apple's procedure, the CR2032 compatibility catch, and the child-safety rules for the old cell.
Dash Cams
Dash cam footage after a crash: how to save it and why you should not delete it
After a crash, the footage on your dash cam can vanish in a few ways: the camera overwrites it, a card fills up, power cuts out, or you…