Carriers and safety
The tag only stores a link. No name, no phone number: you decide in your dashboard what a finder sees.
Which chip to buy01
- NTAG213 is the best fit: 144 bytes, an ID Slid link takes about 50. Works with iPhone and Android.
- NTAG215 / NTAG216 work too (more memory, more expensive).
- Avoid MIFARE Classic and 125 kHz “door fobs”: some phones can't read them.
Carrier formats02
- Sticker (Ø25–30 mm) — phone, laptop, suitcase, helmet.
- Keychain (epoxy or silicone) — keys, backpack, pet collar.
- Card (85×54 mm) — in a wallet next to documents.
- Bracelet — for adults who may need help (for example, older people).
- QR only — cheapest: print on plain paper or a sticker, readable by any phone.
Where to buy03
- Search marketplaces for “NTAG213 stickers” or “NTAG213 keychain”.
- Check the listing says NTAG213/215/216 and 13.56 MHz.
- Any printer works for QR; outdoors, laminate it or use vinyl stickers.
Children and babies04
- Don't give small carriers (stickers, keychains) to children under 3: they can be swallowed.
- Don't hang a tag around the neck on a cord: strangulation risk.
- Attach the tag inside clothing, a backpack or a stroller (sew-in label, pocket).
- Outside — only a QR without the child's name. The name is shown only if you allow it in the dashboard.
Water and metal05
- Epoxy keychains and laminated cards survive rain; paper stickers don't.
- A regular sticker won't read on metal: use an “on-metal” (anti-metal) tag.
- Metal cases and RFID-blocking wallets block NFC: a QR label helps here.
How finders scan06
- iPhone (XS and newer) reads tags without an app: hold near the top of the back.
- Android: NFC must be on; hold to the middle of the back.
- If NFC doesn't work, the phone camera reads the QR, or the code can be typed on the /c page.