Your iOs device in a Bitcoin multi-sig
Use with Bitcoin Core
This is not a wallet, only a key manager. Use Bitcoin Core to download the blockchain, see your wallet balance, craft a transaction, estimate the perfect fee and broadcast it to the network once you’ve signed. It takes a little bit of effort to setup, but after that it’s easy1 to use. The tutorial will guide you through it.
Verify receive addresses
After you create a receive address in Bitcoin Core, you can verify it on the device. That way you can make sure no malware2 on your computer has been messing with it.
Check transaction before you sign
Combine multiple devices
Export and import keys
Multiple NthKey apps
You can run the app on different iOs devices, each with its own3 private keys.
You can export your public keys to Coldcard and vice versa, to create a multisig wallet with it.
Other hardware wallets
Coming soon (tm)
- Testnet only
- See Github issues