Keycard Pal Offline 1.16.0
Sign Ethereum and Bitcoin by QR code with a Keycard NFC smart card
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About Keycard Pal Offline
Keycard Pal is a hardware wallet companion app. It works with a Keycard NFC smart card to sign Ethereum and Bitcoin transactions, and your private keys never leave the card.
Requires a Keycard hardware smart card (keycard.tech). The app talks to the card over NFC: no USB, no Bluetooth.
Your wallet and Keycard Pal talk through animated QR codes. The wallet shows a request, you review it in Keycard Pal, tap your card, and show the signature back. No network connection is needed for any of it.
Features:
- Sign Ethereum transactions (legacy, EIP-1559, EIP-2930)
- Sign EIP-712 typed data with decoded preview before approval
- Sign personal messages (EIP-191 / SIWE)
- Sign Bitcoin transactions via PSBT
- Sign Bitcoin messages (BIP-322)
- Export wallet keys to MetaMask, Rabby, Ledger Live, Sparrow, BlueWallet, and Bitget via UR QR codes
- Generate a key pair on the card, or import a recovery phrase (BIP-39) or SLIP-39 shares
- Genuine Keycard check
- No telemetry, no analytics, no account
Keycard Pal comes in two builds:
- Keycard Pal Offline (com.keycardpal.offline) has no internet permission. It cannot make a network connection.
- Keycard Pal (com.keycardpal) has the internet permission for optional features: WalletConnect, ENS names, transaction simulation with Tenderly, and token images. Each one is off until you turn it on in Settings. WalletConnect needs your own Reown Project ID and simulation needs your own Tenderly API key.
Keycard Pal is free and open-source software.
Advertisement: the Buy a Keycard links in this app are affiliate links. The developer earns a commission on purchases made through them. No app feature depends on buying through them, and every feature of the app is free.
License: MIT
Requires a Keycard hardware smart card (keycard.tech). The app talks to the card over NFC: no USB, no Bluetooth.
Your wallet and Keycard Pal talk through animated QR codes. The wallet shows a request, you review it in Keycard Pal, tap your card, and show the signature back. No network connection is needed for any of it.
Features:
- Sign Ethereum transactions (legacy, EIP-1559, EIP-2930)
- Sign EIP-712 typed data with decoded preview before approval
- Sign personal messages (EIP-191 / SIWE)
- Sign Bitcoin transactions via PSBT
- Sign Bitcoin messages (BIP-322)
- Export wallet keys to MetaMask, Rabby, Ledger Live, Sparrow, BlueWallet, and Bitget via UR QR codes
- Generate a key pair on the card, or import a recovery phrase (BIP-39) or SLIP-39 shares
- Genuine Keycard check
- No telemetry, no analytics, no account
Keycard Pal comes in two builds:
- Keycard Pal Offline (com.keycardpal.offline) has no internet permission. It cannot make a network connection.
- Keycard Pal (com.keycardpal) has the internet permission for optional features: WalletConnect, ENS names, transaction simulation with Tenderly, and token images. Each one is off until you turn it on in Settings. WalletConnect needs your own Reown Project ID and simulation needs your own Tenderly API key.
Keycard Pal is free and open-source software.
Advertisement: the Buy a Keycard links in this app are affiliate links. The developer earns a commission on purchases made through them. No app feature depends on buying through them, and every feature of the app is free.
License: MIT
| Release info | Update on Nov 02, 2026 |
|---|---|
| Release notes | What's Changed • fix: retry a refused secret change with the secret that was entered by @mmlado in https://github.com/mmlado/keycard-pal/pull/475 • refactor: one Keycard tap host for every screen that taps a card by @mmlado in https://github.com/mmlado/keycard-pal/pull/477 • fix: retry a failed key pair load with the same key pair by @mmlado in https://github.com/mmlado/keycard-pal/pull/479 • refactor: the operation runner holds the operation's input by @mmlado in https://github.com/mmlado/keycard-pal/pull/481 • refactor: the WalletConnect provider answers a request however it is left by @mmlado in https://github.com/mmlado/keycard-pal/pull/483 • fix: WalletConnect answers once, and back on the success sheet keeps the signature by @mmlado in https://github.com/mmlado/keycard-pal/pull/484 • chore: declare the clear-signing registry download with the other network features by @mmlado in https://github.com/mmlado/keycard-pal/pull/488 • refactor: WalletConnect typed data goes through the Ethereum payload classification by @mmlado in https://github.com/mmlado/keycard-pal/pull/492 • feat: support BIP85 export in multiple formats by @YanzheL in https://github.com/mmlado/keycard-pal/pull/491 • refactor: one call description for the transaction, every inner call and the vector harness by @mmlado in https://github.com/mmlado/keycard-pal/pull/497 • refactor: the descriptor display as data, drawn by one renderer by @mmlado in https://github.com/mmlado/keycard-pal/pull/500 • refactor: one keyboard-aware bottom action area for the form screens by @mmlado in https://github.com/mmlado/keycard-pal/pull/502 • refactor: one message description for the EIP-712 review and the vector harness by @mmlado in https://github.com/mmlado/keycard-pal/pull/504 • feat: each operation states its success wording once by @mmlado in https://github.com/mmlado/keycard-pal/pull/506 • refactor: keyboard handling through react-native-keyboard-controller, and a settings field that owns its draft by… |
| Listing data | F-Droid |
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