20pcs NFC Stickers Black NFC Tags Sticker NTAG215 NFC Rewritable Tags NFC 215 RFID Sticker (25mm) Programmable NFC Tag 504 Bytes Compatible with iPhone and All Other NFC Enabled Devices

I purchased 100 of these NFC tags - two 30-packs and two 20-packs - and am happy to report 100% success writing to them with my iPhone 11 Pro Max and the freely available NFC Tools app. To clarify, this is my first experience with NFCs and, admittedly, I was a bit cautious, given the failure rates reported by some reviewers. So, I over-ordered, expecting to throw some "duds" away, but this never happened. Yes, I received a couple of write errors on the first few tries, but this ended up being attributable to the concrete and granite counter tops I was working on. Holding the NFC tags in my hand, rather than laying them on my work surface, fixed the issue. Furthermore, I quickly homed in on the iPhone's sweet spot - at the very top edge - and was off to the races. I wrote all 100 tags in about three minutes. For quality control, I checked (read) about 30 of 'em and they passed with flying colors. Not one failure. What's the effective read/write range? My iPhone has an Apple Silicone Case on it and the read/write range is consistently 1". Removing the case reduced the effective range to about 1/2". [I know. Huh?!] My iPhone also has a 2" Volport MagicPlate for magnetically attaching the phone to windshields, tripods, selfie sticks, etc. But it's located in the center of the phone and, to my knowledge, shouldn't affect NFC read/write range. If I could remove the plate without destroying it, I'd test it, but alas, this isn't an option. I will certainly be reordering these, since my favorite business card printing service doesn't yet offer NFC options. Until they do, I'm sticking these to the back side of my business cards, right next to the QR code. I'm a music composer and producer by trade and it's pretty cool that folks can tap the cards and stream my music on the spot. Of course, for this, reliability is critical, so I appreciate how well these tags are working so far. Great product!

Must have NFC, works well and easy to use and setup. Sticks and durable

They work for what they're needed for but peel offly easy after repeated use. Maybe last a month before I see signs of peeling.

I purchased this more out of curiosity than necessity; and I had no idea how incredibly fascinating this product could be. In terms of versatility; the used cases for this product are as varied as the product is high quality. Not only are these devices capable of a large data load, but they are re-rideable allowing you to use the same tag numerous times. As a result of the ability to seamlessly script together multiple commands on one tag, The possibilities of how you can put those commands together open the door towards a myriad of practical uses, as well as providing endless opportunity for advancing one’s understanding of the technology as well as coming up with some very, very cool concepts! So far I have been able to build a tag that I was able to use to unlock a tablet that I have been unable to use for months. I am reasonably certain that was a minor modification to the code, I can reuse that scripting to access a similarly locked phone that I’ve had in a drawer. Beyond the thrill of the success in that experiment, i’ve also now created a major timesaver by having a instant access key for information that I used to have to manually enter numerous times a day. I am telling you that if you are curious enough to read this review; it’s time to take the plunge. You will not run out of new things that you can do with this product. Buy it now!

I’ve set these up using iOS shortcuts and they are very inconsistent. I usually have to leave it on the tag for awhile before it activates and that’s if it does. Usually it just doesn’t work. Or I’ll remove my device and 1 minute later the shortcut will run. Really odd behavior. Disappointing product, can’t recommend

These work great with android but not iphone. I do believe this is because if apple securitys

Got these to put around the house for Home Automation stuff, program easily and work as expected. Seems easy with android, seems a PITA with Apple like NFC isn't on all the time by default. Luckily all Android house with only one apple product so not an issue.

But with the tent of labeling every medication I take so I can log it with my phone. It works great. It takes well to the bottle cap, allowing the phone just just stay close by it is a great value for the price.