What is Nunchuk wallet?

Nunchuk wallet is a self-custody bitcoin app built mainly for multisig, the setup where several keys must approve a payment. It lets you combine your phone with hardware wallets from different makers so no single device is a point of failure. The company now markets itself heavily around bitcoin inheritance.

How does Nunchuk multisig work?

When you create a multisig wallet in Nunchuk, you choose how many keys exist and how many must sign, for example 2-of-3. Each key can live on a different device. The App Store listing names Coldcard, Ledger, Jade, Tapsigner and Trezor among supported signers. Coldcard's own documentation says Nunchuk can pass partially signed transactions to its devices by microSD, NFC or QR, which allows air-gapped signing. That format is explained in what is a PSBT.

Nunchuk treats output descriptors as a core part of the design, and its launch post says multisig wallets made in Nunchuk can be recovered in other software such as Bitcoin Core. Group wallets let family members or business partners approve payments together. For the basic concept, see our multisig wallet guide.

Other listed features include coin control, replace-by-fee, Tor, connecting to your own node, spending limits, key health checks and decoy wallets. Inheritance can be set up with either off-chain recovery or on-chain timelocks, and the app asks for no ID check beyond an email address.

Does Nunchuk wallet have a desktop version?

Yes. Nunchuk publishes desktop apps for macOS, Windows and Linux on GitHub alongside its iOS and Android apps. The desktop client is written in Qt and licensed under GPL-3.0. Both the desktop and mobile apps use libnunchuk, a C++ multisig library built on Bitcoin Core code, also licensed under GPLv3. Being able to read and build the code is useful for people who want to check how their keys are handled.

Does Nunchuk wallet support watch only or Lightning?

As of November 2026, Nunchuk's App Store listing and launch materials describe on-chain bitcoin features and do not list Lightning payments. If you need Lightning, you would use a separate app; our Lightning Network guide explains how it differs from on-chain bitcoin.

Nunchuk's public materials that we reviewed also do not describe a dedicated watch-only mode, so check the current app if you need to track a wallet without any keys on the device. What the materials do stress is the opposite case: keeping keys on separate signers while the app coordinates them.

What should you check before using Nunchuk?

Multisig is more complex than a single seed phrase. You need to back up each key and the wallet configuration, since losing the configuration can make recovery harder even when you still hold enough keys. Practise a small test transaction and a test recovery before moving larger amounts.