OneCryption
Christian Hell Utilities iPhoneiPadiPod touch
OneCryption is a free Utilities app for iPhone and iPad by Christian Hell. Rated 5.0/5 from 1 ratings. Requires iOS 17.6. Updated October 13, 2026.
- Rating
- 5.0
- 1 ratings
- Price
- Free
- on the App Store
- Size
- 11 MB
- Age 4+
- Updated
- Oct 13
- 2026 · v2.1.1
Screenshots
About OneCryption
Private files and messages, encrypted on your iPhone. OneCryption is an offline encryption tool for people who prefer to exchange secret keys in person. It does not operate a message-delivery network: you choose how to send the encrypted result. HOW IT WORKS 1. Meet your contact and confirm their identity. 2. Generate shared secret key material and transfer it directly between nearby devices. 3. Write a message or select content, encrypt it locally, and share the encrypted result through a channel you choose. 4. The recipient decrypts it with the matching shared key. YOUR KEYS, YOUR CONTROL - Encrypt and decrypt text, photos, videos, audio and files. - Manage contacts and shared keys on your device. - See how much key material remains and exchange a fresh key when needed. - Use local encryption without a OneCryption messaging account. OneCryption uses a one-time-pad workflow. Key material must remain secret and must never be reused. Protect the devices and the key exchange. The channel you use to deliver encrypted content has its own privacy and metadata implications; encryption does not make a compromised device safe. FREE AND PREMIUM Text encryption is available for free. Some media and file features require Premium. Purchase options and current prices are shown in the app. If you choose a subscription, it renews automatically unless you cancel it in your App Store account settings. Privacy policy: https://www.onecryption.com/privacy Terms of Use (EULA): https://www.apple.com/legal/internet-services/itunes/dev/stdeula/
What’s new
Version 2.1.1 · Updated October 13, 2026
Security update for file and audio encryption. Key material is now reserved before encryption, and key counters cannot be reset by stale saves. Previously encrypted messages remain readable. Newly encrypted files and audio require OneCryption 2.1.1 or later on both devices. Messages using a future unsupported format now show an update notice with a link to the App Store. Adaptive layouts for iPhone Duo and improved translations across all eight supported languages.
App privacy
The developer, Christian Hell, reported these privacy practices to Apple.
Data Not Collected
The developer does not collect any data from this app.
Alternatives to OneCryption
Looking for apps like OneCryption? Here are 6 similar apps on the App Store. The highest rated is ToolNest (5.0/5), and all 6 are free to download.
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| App | Rating | Price | Last updated | Compare |
|---|---|---|---|---|
| OneCryption | 5.0 / 5 (1 rating) | Free | October 13, 2026 | |
| Encryption: Secure Text | – | Free | Jun 15, 2026 | Compare |
| Enigma Cipher The Unbreakable | 3.7 / 5 (3) | Free | Apr 7, 2026 | Compare |
| ToolNest | 5.0 / 5 (1) | Free | Sep 11, 2026 | Compare |
| HexaVault Password Manager | – | Free | Apr 26, 2026 | Compare |
| SUYLEX-DIGITAL SECURITY RADAR | – | Free | Aug 3, 2026 | Compare |
| Fiux | – | Free | Nov 5, 2025 | Compare |
Compare OneCryption with the top alternatives: ratings, updates, ASO score and keyword gaps →