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
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Key facts
- Official site
- 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- Release 2.0.3 (April 2019) was withdrawn by the developer because addresses were sometimes derived incorrectly on older devices.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| 18 April 2019 | First official release of the Flutter version for Android (v2.0.3), later withdrawn and replaced by v2.0.4.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
- Download: apps.apple.com/us/app/natrium-nano-wallet/id1451425707
- Source code: github.com/appditto/natrium_wallet_flutter
- Support: 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
- Natrium — README (GitHub)
- Natrium — app strings, intl_messages.arb (GitHub)
- Natrium — releases (GitHub API)
- Natrium — App Store listing (lookup API)
- Natrium — support page
- Natrium — backend server commits (GitHub)
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