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

# Natrium: keys, security, fees and reviews

## In short

- **Key control**: Self-custody: the wallet seed is kept on the device and must be backed up by the user
- **Fees**: Wallet: Free download
- **Risks and caveats**: Losing the seed means losing access to funds; the app says so when logging out.
- **Checked**: 31 October 2026

## Key facts

- **Official site**: [natrium.io](https://natrium.io/)

Key facts checked on 31 October 2026 against official sources.

## What is Natrium

Natrium is a free, open-source mobile wallet for the Nano (XNO) cryptocurrency for iOS and Android, made by Appditto. The wallet seed is stored on the device; the app has not had a new release since October 2024.

## Who holds the keys

| Parameter | Details |
|---|---|
| Key control | Self-custody: the wallet seed is kept on the device and must be backed up by the user |
| Recovery | Without a backed-up seed, funds cannot be recovered after logging out |
| Account model | Users can import an existing seed or create a new wallet |
| Representative | Users choose a Nano voting representative, which cannot spend their funds |

## Features and supported networks

| Parameter | Details |
|---|---|
| Platforms | iOS (App Store, iOS 12 or later) and Android |
| Supported networks | Nano only |
| Paper wallets | Sweeps funds from a paper wallet seed into the Natrium wallet |
| Authentication | 6-digit PIN or biometrics to unlock the app |

## Security and audits

- The app code is open source under the MIT licence; the app's visual assets are under a proprietary licence.
- The vendor's App Store description says the app was audited by Red4Sec; the audit report itself is not linked.
- Release 2.0.3 (April 2019) was withdrawn by the developer because addresses were sometimes derived incorrectly on older devices.

## Security incidents

Incidents are reported by third parties (press, incident databases) but are not confirmed in the company’s own channels, so none is listed here.

## Fees

| Parameter | Details |
|---|---|
| Wallet | Free download |

## History

| Date | Event |
|---|---|
| 10 March 2019 | Natrium is released on the iOS App Store. |
| 18 April 2019 | First official release of the Flutter version for Android (v2.0.3), later withdrawn and replaced by v2.0.4. |
| 25 March 2021 | Version 2.4.0 adds an in-app alert system and moves to Flutter 2.0. |
| 8 October 2024 | Version 2.5.2, the latest release, updates the block explorer list and raises the iOS minimum to 12.0. |
| 14 October 2026 | The Natrium backend server repository receives updates (push notifications, node callbacks). |

## Risks and caveats

- Losing the seed means losing access to funds; the app says so when logging out.
- The last app release was in October 2024, and the help page footer dates from 2021.
- Only Nano is supported.

## About the developer

- **Developer**: Appditto
- **Legal entity**: App Store seller: Avenge Media LLC
- **Founded**: On the App Store since March 2019

## Official links

- Website: [natrium.io](https://natrium.io/)
- Download: [apps.apple.com/us/app/natrium-nano-wallet/id1451425707](https://apps.apple.com/us/app/natrium-nano-wallet/id1451425707)
- Source code: [github.com/appditto/natrium_wallet_flutter](https://github.com/appditto/natrium_wallet_flutter)
- Support: [help.natrium.io](https://help.natrium.io/)

## Questions and answers

**Is Natrium self-custodial?**

Yes. The wallet seed stays on the device and must be backed up by the user; without the seed, funds cannot be recovered.

**Is Natrium open source?**

Yes. The app code is on GitHub under the MIT licence; the app's visual assets are proprietary.

**Which coins does Natrium support?**

Only Nano (XNO).

**Who makes Natrium?**

Appditto; the App Store seller is Avenge Media LLC.

**Is Natrium still maintained?**

The latest app release is version 2.5.2 from 8 October 2024. The backend server code was updated in October 2026.

## Sources

- [Natrium — home page](https://natrium.io/)
- [Natrium — README (GitHub)](https://github.com/appditto/natrium_wallet_flutter/blob/master/README.md)
- [Natrium — app strings, intl_messages.arb (GitHub)](https://github.com/appditto/natrium_wallet_flutter/blob/master/lib/l10n/intl_messages.arb)
- [Natrium — releases (GitHub API)](https://github.com/appditto/natrium_wallet_flutter/releases)
- [Natrium — App Store listing (lookup API)](https://itunes.apple.com/lookup?id=1451425707&country=us)
- [Natrium — support page](https://help.natrium.io/)
- [Natrium — backend server commits (GitHub)](https://github.com/appditto/natrium-wallet-server/commits/master.atom)

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Page updated: 2026-11-01

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Source: https://revain.org/wallets/natrium-wallet/