I love AirTags, but this slim card tracker is better for my wallet - and works with iOS and Android

KeySmart's new dual-network SmartCard works with Apple FindMy and Google Find Hub, so you can track your wallet with any phone.
GitHub

Android HCE Beginner App

I will quote a lot of times from this official document, see the full document here: https://developer.android.com/develop/connectivity/nfc/hce This app explains how ...