Nunchuk is the best multisig Bitcoin wallet on mobile — purpose-built for 2-of-3 setups, supports all major hardware wallets via QR/NFC, and includes collaborative group wallets. Full review 2026.
Nunchuk is the most capable multisig Bitcoin wallet available on mobile. While most wallets treat multisig as an advanced feature buried in settings, Nunchuk was designed from the ground up for multisig — with an interface that makes 2-of-3 setups accessible to serious HODLers who don't want to manage a full desktop node.
Here's a full review of Nunchuk in 2026.
| Feature | Details |
|---|---|
| Platform | iOS, Android, Desktop (Mac, Windows, Linux) |
| Wallet type | Self-custody, multisig-first |
| Multisig support | Yes — 2-of-3, 3-of-5, any m-of-n |
| Single-sig support | Yes |
| Hardware wallet support | Coldcard, Trezor, Ledger, BitBox02, Passport, Keystone |
| NFC support | Yes (Coldcard Q, Keystone) |
| PSBT support | Yes (full) |
| Lightning | No |
| Taproot | Yes |
| Coin control | Yes |
| Price | Free |
| Open source | Yes (core libraries) |
The verdict: If you want multisig on mobile, Nunchuk is the best option available. It's more powerful than BlueWallet for multisig, more mobile-friendly than Sparrow, and purpose-built for the key management workflows that serious HODLers need.
Nunchuk targets HODLers who:
It's not for beginners. If you're new to Bitcoin and just want to buy and hold, BlueWallet or Phoenix Wallet are better starting points. Nunchuk is for users who have outgrown single-sig custody and want to step up to multisig without moving to a paid service like Unchained or Casa.
Nunchuk's multisig setup is the most straightforward implementation on mobile. The process:
Nunchuk supports collaborative multisig — where each signer is a different person — through its "group wallet" feature. This is how you'd set up a family multisig where you and your spouse each hold a key, with a trusted third party holding a backup key.
Group wallets: Nunchuk's group wallet feature allows multiple users with separate Nunchuk accounts to share a multisig wallet. Each user manages their own signer; the app coordinates PSBT signing across participants. This is a fundamentally different use case from single-user multisig and is rare to find in free mobile wallets.
Nunchuk integrates with all major hardware wallets:
| Hardware Wallet | Connection Methods |
|---|---|
| Coldcard Mk4 | MicroSD, NFC (via companion app) |
| Coldcard Q | QR code, NFC, microSD |
| Trezor Model T / Safe 3 | USB (desktop only) |
| Ledger Nano X / S Plus | USB (desktop only) |
| Foundation Passport | QR code, microSD |
| Keystone Pro | QR code, NFC |
| BitBox02 | USB (desktop only) |
| SeedSigner | QR code |
For mobile use, air-gapped hardware wallets with QR codes (Keystone, Passport, SeedSigner) or NFC (Coldcard Q) work best. USB hardware wallets require Nunchuk's desktop app.
This is an important distinction: if you want to manage multisig entirely from your phone, pair Nunchuk with a QR-based hardware wallet like the Keystone Pro or Foundation Passport.
Multisig transactions in Nunchuk follow the PSBT (Partially Signed Bitcoin Transaction) standard:
For 2-of-3 multisig, you need two signers to complete this cycle before broadcasting.
Air-gapped workflow on mobile: With a QR-compatible hardware wallet, the entire flow happens via camera and screen — no USB, no Bluetooth, no network connection on the signing device. This is as secure as it gets for mobile transaction signing.
Nunchuk has first-class PSBT support. You can import PSBTs from external tools, partially sign them, and export for other signers. This makes Nunchuk interoperable with Sparrow, Electrum, and any other PSBT-compatible wallet.
Nunchuk gives you full control over which UTXOs are spent in a transaction. This is important for privacy (avoiding address linking) and for managing different "batches" of Bitcoin acquired at different times.
Nunchuk has built-in inheritance features that let you set up time-locked transactions or document recovery procedures for your multisig setup. This is rare in free wallets and addresses one of the main challenges of self-custody multisig.
Nunchuk supports Taproot (P2TR) addresses, including Taproot multisig. Taproot multisig transactions appear on-chain as single-sig transactions, enhancing privacy and reducing fees.
A unique Nunchuk feature: you can create a "dummy transaction" to verify the receive address on your hardware wallet before sending funds. This catches the class of attack where malware substitutes a different address.
| Wallet | Multisig | Mobile | Hardware Wallet | Group Wallets | Cost |
|---|---|---|---|---|---|
| Nunchuk | Excellent | Yes (iOS/Android) | All major | Yes | Free |
| Sparrow | Excellent | Desktop only | All major | No | Free |
| BlueWallet | Basic | Yes | Via PSBT | No | Free |
| Electrum | Advanced | Desktop only | Trezor/Ledger/others | No | Free |
| Casa Gold | Good | Yes | Coldcard, Ledger, mobile | Yes (managed) | $250/yr |
| Unchained | Excellent | Web-based | Coldcard, Trezor, Ledger | Yes (managed) | $250/yr |
Nunchuk vs. Sparrow: Sparrow is the gold standard for desktop multisig — it has more advanced coin control, better Whirlpool integration, and a more powerful UTXO management interface. But Sparrow is desktop-only. Nunchuk brings 90% of Sparrow's multisig capability to mobile.
Nunchuk vs. Casa: Casa is a managed multisig service with guided setup, phone support, and an institutional key. Nunchuk is self-managed multisig — no institutional partner, no support contract, fully sovereign. Casa costs $250/year; Nunchuk is free. The trade-off is complexity and the absence of a recovery service.
Nunchuk vs. BlueWallet: BlueWallet supports multisig but it's not the primary use case. Nunchuk is purpose-built for multisig with a better UI for complex setups, group wallets, and inheritance planning.
Nunchuk connects to the Bitcoin network to fetch transaction data and broadcast transactions. By default, it uses Nunchuk's own servers. For maximum privacy:
For serious privacy, pair Nunchuk with a personal node running Electrs or similar Electrum server software.
The Nunchuk documentation at nunchuk.io/docs is thorough and covers multisig setup step-by-step for each hardware wallet combination.
Is Nunchuk free? Yes. The core wallet app is free. Nunchuk has announced premium features in the past but the multisig functionality remains free.
Does Nunchuk require creating an account? A Nunchuk account is required for group wallet features and cloud backup of wallet configurations. For maximum privacy, you can use Nunchuk's local-only mode without account creation.
Can I use Nunchuk with just one hardware wallet? Yes. You can use Nunchuk as a single-sig wallet connected to a hardware wallet, or even as a software-only wallet. The multisig features are optional.
Is Nunchuk open source? Nunchuk's core libraries are open source. The mobile app itself has not been fully open-sourced, but the cryptographic core that handles key management and transaction signing is auditable.
Can I import a wallet created in Sparrow into Nunchuk? Yes. If you have a Sparrow multisig wallet, you can import the wallet descriptor into Nunchuk. Both apps support standard PSBT and multisig formats.
Nunchuk is the best free multisig Bitcoin wallet available on mobile. It brings desktop-class multisig features to iOS and Android, supports all major hardware wallets via air-gapped QR/NFC signing, and includes collaborative group wallets for family or trusted-party multisig setups.
If you hold more than $50,000 in Bitcoin and are serious about self-custody security, Nunchuk is the upgrade path from single-sig hardware wallets that doesn't require paying $250/year for a managed service like Casa or Unchained.
Get our free Beginners Guide to Buying Bitcoin plus weekly insights for long-term holders.
Phoenix Wallet is a self-custodial Lightning wallet that handles channel management automatically — no liquidity management required. Full 2026 review of fees, UX, and how it compares.
Electrum Bitcoin wallet review 2026: 13+ years of history, built-in Lightning, UTXO coin control, hardware wallet support, multisig. The power user's classic desktop wallet.
BlueWallet review 2026: free, open-source Bitcoin and Lightning wallet for iOS and Android. Multisig vault, coin control, Tor, LNDHub node connection. Best for intermediate users.