Review on THONSEN 20PCS NFC Tags Black NTAG215 NFC Stickers Rewritable NFC Tags With Adhesive For Home Automation, IOS NFC Tags 504 Bytes Memory, Compatible With NFC-Enabled Android & IPhone, 1Inch/ 25Mm by Tiffany Powers

So far what I have used them for is to attach them to business cards to transfer my website quickly and easily to unexpecting future clients >:DBut really, they have a solid stick, low profile, and easy enough to print on with an inkjet printer if you line them up correctly. They are as fast as your phone accepts NFC and will read through a leather case with a plastic backing but anything thicker renders it unusable.I use the NFC Tools app to write to these and will be looking for more creative ways of syncing them up with my Alexa and other smart devices around the house.