It ships with half a key. The other half doesn't exist until your phone makes it. Load it, wrap it, hand it over. From then on it works like cash: whoever holds it, owns it.
Your half of the key is 12 words made by your own phone, offline if you like. There is nothing to phish and no database to hack, because there is no database.
The card's address cannot exist until your words do, so it arrives empty by mathematics, not by promise. You load it from your own wallet, and from then on it answers to whoever holds it.
Scan, peel, follow the phone. The bitcoin sweeps into Sparrow, Electrum or any normal wallet. No app, no account, nothing to learn first.
WHY IT'S YOURS
// apart, neither half moves anything. we never see yours.
WORKS EVEN IF WE DISAPPEAR. DON'T TRUST IT, CHECK IT.
One web page, one file, no backend. Read the whole thing if you like.
open it → 02It still works. There is even a build with no networking at all.
see the offline build →It opens your card forever, even if we are long gone. Both halves are standard 12-word phrases; the finished key sweeps into Sparrow, Electrum or any normal wallet.
yours to keepAnd the cost of all that: no words = no bitcoin · no backup. Lose the card or the words and nobody can bring it back. Not even us.
FLOW
Any phone camera. Your phone makes the 12 words.
Copy them onto the strip by hand, re-type to confirm.
From any wallet, any amount. Check the balance any time.
They open it years later with a phone. Any wallet.
WHAT'S INSIDE
No chip, no battery, no firmware, no app. Nothing to update, brick or lock you out. Paper, ink and mathematics, holding real bitcoin.
// nothing expires. and nothing recovers: lose the card or the words, and it's gone.
THE CARDS
The information and the cryptography never change. You're only choosing the front.
WHAT IT'S FOR
No server, no battery, nothing that expires. Opening it takes the twelve words.
THE FIELD
| Bitcards | Tangem | Burner | Exchange | |
|---|---|---|---|---|
| Key never assembled on a vendor server | Yes, split in two | Yes, on-device | Varies | Custodial |
| Made to be gift-wrapped and handed over | Yes | Self-buy kit | Self-buy | No |
| Open with no app | Scan · peel · phone | Its app | Its app | Its app |
| No app / no account | Yes | App | App | Account |
| Works even if the maker disappears | Yes | App-dep | Rail-dep | No |
| Opens with no special hardware | A phone camera | NFC phone + app | Its app | Account |
| Price (each) | ~$15 | ~$50+ | ~$25 | Spread + fees |
swipe the table sideways to see every column
// prices are approximate public listings. product names belong to their owners.
$15 each, or 3 for $30 · charged only when it ships · cancel free before then
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