Buy ordinary NFC tags that a phone can read and write. Medication Timer does not manufacture or ship coins.
Buy this
- NFC NTAG213 or NTAG215 stickers or coins (13.56 MHz, NFC Type 2). iPhone and most Android phones can program these.
- A coin or round sticker for a pack lid. Flat NFC stickers work on plastic bottles and cardboard boxes.
- Ferrite-backed coins (often sold as anti-metal) if the pack is foil or the bottle is metal. Foil blister packs block a normal sticker.
NTAG213 is enough. The app writes a short link. NTAG215 also works.
If a listing says NFC, NTAG213, NTAG215, or 13.56 MHz NTAG, it is in the right family.
Skip this
- 125 kHz RFID (many pet chips, older door fobs, cheap key fobs that are not NFC)
- UHF RFID (warehouse pallet tags)
- Employee proximity badges that are not NDEF NFC
- Kitchen RFID readers or smart-home hubs. Devices in this version is phone-to-coin only
Phones cannot program 125 kHz or UHF tags.
Phone tips
Keep the coin within a few centimetres of the back of the phone. On Android, turn NFC on before you program. On iPhone, keep the app in the foreground while writing. Metal plates in some cases can block NFC.
See How do I use RFID coins? to program a tag after you have one.
