I’m using NFC 215 coins bought on Amazon in this video. These were about $10 for 50 NFC tags!
The NFC tag shown is 1” in diameter and quite thin. It’s a hard plastic that isn’t very flexible—kinda like a tiddlywinks-chip if you remember those.
Just search for “NFC 215” on Amazon and you’ll find plenty of options.
These NFC tags are rewritable and compatible with most smartphones, not only iPhones.
