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Gerfaut is a watch-only bitcoin wallet for Android, Linux, macOS and Windows. Give it a descriptor, an extended public key or an address, and it shows the balance, the history and the coins of that wallet.
Gerfaut is in public beta and has had little testing. Check every address and amount on your signing device before you rely on it. Report anything that looks wrong on GitHub, as Contact explains.
The Gerfaut desktop overview of a wallet named Cold storage, with its balance in BTC, a balance history chart, the watch status and the latest activity.

One page shows what the wallet holds, where the data comes from and how the balance moved.

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Watch your wallets

  • Read the balance: See the balance and history and the UTXOs behind it.
  • Open a transaction: Follow its inputs, outputs and fee on one diagram. See Open a transaction.
  • Receive: Hand out the next unused address with its QR code. See Receive.
  • Read a policy: See every spending path of a Miniscript descriptor, with its timelock counted down. See Read a policy.
  • Broadcast: Send a transaction your signing device signed, after Gerfaut reads it back in plain words. See Broadcast.
  • Get notified: Get a notification when a transaction reaches the mempool, and again when it confirms. See Notifications.
  • Pick the backend: Stay on the public servers or point Gerfaut at your own node, .onion included. See Backend.
  • Keep it yours: Lock Gerfaut with an app lock and move your wallets with an encrypted backup.
Gerfaut contains no code that generates private keys, handles seeds or signs transactions. It refuses anything that contains a private key or a seed phrase.
The Gerfaut Android home screen with a Signet chip, two wallet cards named Cold storage and Timelock vault with their balances, and an Add a wallet button.

The Android home screen lists every watched wallet with its balance, one network at a time.