iPhone: automatic, but mostly Apple-focused
iPhones show an alert when an unknown AirTag or other Find My network accessory seems to be travelling with you. The alert lets you play a sound on the tag and see how to disable it. It runs in the background, which is its biggest strength.
The gap: trackers that are not part of Apple's Find My network, such as many Tile and Samsung SmartTag devices, are generally covered only by the maker's own app and alerts.
Android: built-in alerts plus manual scans
Recent Android versions include unknown tracker alerts (usually under Settings → Safety & emergency), with a manual scan button. Apple also publishes a Tracker Detect app for Android that you can open to look for nearby AirTags and Find My accessories.
The gap: depending on the phone and settings, the alert may not be on by default, and manual scans only help when you think to run them.
What neither guarantees
- An instant warning. Alerts wait for evidence, so a tracker can travel with you for a while first.
- Coverage of every brand and every model.
- Any help at all if the alert setting is switched off or the Bluetooth is off.
A free way to cover the gaps
- Switch on your phone's own alerts today (see AirTag detector for Android).
- Run a second scanner when you are in a situation you worry about, such as a long trip. TrackerGuard shows you how long and in how many places each tracker was heard, for AirTag, SmartTag, Tile and Chipolo, though only while the page is open.
- Know the steps if one turns up: found an AirTag? what to do.
In testing. TrackerGuard is a helper, not a guarantee. Alerts on your phone should stay on.