Clench Wallet

Clench is a Bitcoin-only, non-custodial Bitcoin wallet for Android. It uses Bitcoin Dev Kit and stores wallet data locally on the device.

Wallet features:

- Create single-sig and multisig wallets.

- Import watch-only wallets from descriptors.

- Create or restore BIP-39 seed phrase wallets with an optional passphrase.

- Use native SegWit, nested SegWit, legacy, and Taproot script types.

- Connect to Electrum servers, including personal servers and Tor SOCKS5 routes.

- Use coin control, UTXO freezing, labels, batch payments, RBF fee bumping, CPFP, cancel replacement attempts, raw transaction import, and sweep flows.

- Run node diagnostics for Electrum route, Tor mode, TLS pinning, server version, and tip height.

Hardware-wallet features:

- Exchange PSBTs by animated QR, BBQr, an intentional NFC tap, microSD/user-selected file import, or signed-return import where supported.

- Clench does not communicate with signing devices over USB or Bluetooth. A signer may still use USB for power.

- Work with QR-based signers such as SeedSigner, Keystone, Foundation Passport, and Blockstream Jade. v0.3.28 adds physically unverified protocol presets intended for OneKey Pro, Krux, and Specter DIY; the Krux and Specter DIY presets also include user-selected microSD/file transfer.

- Work with Coldcard Q, Coldcard Mk4, and Coldcard Mk5 transfer paths.

- Check TAPSIGNER NFC Tap Protocol status.

- Sweep SATSCARD active slots with certificate verification and explicit CVC-authenticated unseal confirmation.

- Set up, verify, import, and back up TAPSIGNER cards, and directly sign supported single-signature BIP84 native-SegWit or standard BIP48 native-P2WSH multisig inputs with complete in-app review and returned-signature verification.

- TAPSIGNER payment signing does not support Taproot, legacy, nested SegWit, nonstandard P2WSH, other account paths, or PIN change.

- The OneKey Pro, Krux, Specter DIY, and TAPSIGNER multisig paths have automated coverage but no recorded physical-device acceptance; no model/firmware compatibility claim is made for those new paths.

- Require explicit broadcast confirmation after hardware-wallet signing.