[jeroenhd]

As far as I can find, Track Detect still doesn't automatically scan in the background, though? You'll have to run the app every time you suspect you're being tracked (which would mean "any time you leave from or return to somewhere" without background scans).

[Boltgolt]

Airguard is an open source app that can detect both Tiles and Airtags in the background: https://play.google.com/store/apps/details?id=de.seemoo.at_t... Works quite well, has notified me of tags that are on a train with me quite a few times.