Probably the defacto standard for NFC Tags on Android. Simple and effective (and doesn't push payments, thank you!) However... my biggest complaint is the UI is considerably dated. A UI overhaul would help bring it up to modern standards. Also reporting what looks like a bug: if you open the app, press the home button then open the app again, you can no longer scan NFC tags in the app! You must force close the app to get scanning working again. Android 17. Would be good to fix.