Tracker Detect looks for Find My compatible item trackers that may be with you.
Apple launches AirTag detector app for Android: All you need to know
Google Adds AirTag Tracker Detection to Android
Tracker Detect - Apps on Google Play
Google Fit: Activity Tracking - Apps on Google Play
Find unknown trackers - Android Help
Tracker - Airtag Detect - Apps on Google Play
Tracker Detect - Apps on Google Play
Tracker Detect - Apps on Google Play
What to do if you get an alert that an AirTag, Find My network accessory, or set of AirPods is with you - Apple Support