[Wallets](https://revain.org/wallets/) › Muun

# Muun: keys, security, fees and reviews

## In short

- **Key control**: 2-of-2 multisig: the phone holds one key and Muun co-signs daily transactions; Muun's servers store only the second key.
- **Fees**: Wallet: No wallet fee is listed; Lightning payments can cost as little as 1 satoshi, and a mempool-based estimator sets on-chain fees.
- **Risks and caveats**: Muun is self-custodial and does not control the Bitcoin or Lightning networks, so delays, outages or congestion are outside its control.
- **Checked**: 31 October 2026

## Key facts

- **Official site**: [muun.com](https://muun.com/)

Key facts checked on 31 October 2026 against official sources.

## What is Muun

Muun is a self-custodial mobile wallet for bitcoin and the Lightning Network on iOS and Android, made by Muun Wallet Inc. It uses a 2-of-2 multisig model in which the phone holds one key and Muun's servers co-sign, with both keys exportable in an encrypted Emergency Kit.

## Who holds the keys

| Parameter | Details |
|---|---|
| Key control | 2-of-2 multisig: the phone holds one key and Muun co-signs daily transactions; Muun's servers store only the second key. |
| Recovery | The Emergency Kit contains both keys (encrypted) and output descriptors, so funds can be spent without Muun. |
| Seed phrase | No mnemonic seed phrase; backup is a Recovery Code on paper or email, password and recovery code. |
| Custodian | Muun does not hold users' bitcoin; with turbo channels for Lightning, users briefly trust Muun not to double-spend a channel opening. |

## Features and supported networks

| Parameter | Details |
|---|---|
| Platforms | Mobile apps for Android and iOS. |
| Supported networks | Bitcoin only, on-chain and Lightning, from a single balance. |
| Lightning | Pays Lightning invoices with no channel management for the user. |
| Multisig | Every wallet is 2-of-2 multisig; outgoing transactions need both keys. |

## Security and audits

- Open source under the MIT licence since February 2021: the iOS (falcon), Android (apollo), libwallet and recovery-tool code is on GitHub.
- A separate open-source recovery tool lets users move funds using the Emergency Kit without Muun's servers.
- No published third-party security audit is linked; the site invites users to audit the code on GitHub.

## Security incidents

No security incident is recorded in the sources checked on 31 October 2026 (the company’s own channels and incident databases): [api.llama.fi/hacks](https://api.llama.fi/hacks), [rekt.news/leaderboard](https://rekt.news/leaderboard), [hacked.slowmist.io/search](https://hacked.slowmist.io/search/), [blog.muun.com](https://blog.muun.com/), [api.github.com/repos/muun/{apollo,falcon,recover](https://api.github.com/repos/muun/{apollo,falcon,recovery}/security-advisories)

## Fees

| Parameter | Details |
|---|---|
| Wallet | No wallet fee is listed; Lightning payments can cost as little as 1 satoshi, and a mempool-based estimator sets on-chain fees. |

## History

| Date | Event |
|---|---|
| 21 October 2019 | Muun released its iOS app after TestFlight testing. |
| 28 December 2020 | Turbo channels explained, with an option to disable them. |
| 11 January 2021 | Muun 2.0 launched. |
| 1 February 2021 | Switched to the MIT licence with apps buildable from the public repository. |
| October 2026 | Android app source code still being updated on GitHub in October 2026. |

## Risks and caveats

- Muun is self-custodial and does not control the Bitcoin or Lightning networks, so delays, outages or congestion are outside its control.
- Turbo channels require briefly trusting Muun; users can turn them off.
- Daily spending depends on Muun co-signing; without Muun's servers, funds are moved with the Emergency Kit and recovery tool.

## About the developer

- **Legal entity**: Muun Wallet Inc., incorporated in the Cayman Islands.
- **Licence / registration**: Terms governed by the laws of the Cayman Islands.

## Official links

- Website: [muun.com](https://muun.com/)
- Blog: [blog.muun.com](https://blog.muun.com/)
- Source code: [github.com/muun](https://github.com/muun)

## Questions and answers

**Is Muun self-custodial?**

Yes. Muun is a 2-of-2 multisig wallet: the phone holds one key, Muun's servers hold only the second, and the Emergency Kit holds both encrypted keys.

**Does Muun use a seed phrase?**

No. Backup is an Emergency Kit with private keys and output descriptors, protected by a Recovery Code or email and password.

**Is Muun open source?**

Yes. The iOS and Android apps and the recovery tool are on GitHub, under the MIT licence since February 2021.

**Who makes Muun?**

Muun Wallet Inc., a company incorporated in the Cayman Islands.

## Sources

- [Muun — Home](https://muun.com/)
- [Muun — Terms and conditions](https://muun.com/terms_and_conditions.html)
- [Muun blog — Muun's multisig model](https://blog.muun.com/muuns-multisig-model/)
- [Muun blog — Turbo channels](https://blog.muun.com/turbo-channels/)
- [Muun blog — Muun iOS release](https://blog.muun.com/muun-releases-non-custodial-bitcoin-and-lightning-wallet-for-ios/)
- [Muun blog — Announcing Muun 2.0](https://blog.muun.com/announcing-muun-2-0/)
- [Muun blog — New open source model](https://blog.muun.com/muuns-new-open-source-model/)
- [GitHub — muun organisation](https://github.com/muun)
- [GitHub — muun/apollo](https://github.com/muun/apollo)

## More in this section

- [Zengo](https://revain.org/wallets/zengo/)
- [Keeper Wallet](https://revain.org/wallets/waves-wallet/)
- [Leather](https://revain.org/wallets/leather/)
- [Phoenix Wallet](https://revain.org/wallets/phoenix/)
- [UniSat Wallet](https://revain.org/wallets/unisat/)
- [Xverse](https://revain.org/wallets/xverse/)
- [All Wallets →](https://revain.org/wallets/)

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Page updated: 2026-10-31

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Source: https://revain.org/wallets/muun/