# Paranoia Text Encryption PRO — (encrypt notes, messages, …)

> Advanced text encryption and steganography app with multiple strong algorithms. (iPhone/iPad app by Frantisek Dvorak.)

- Source: https://appshunter.io/ios/app/paranoia-text-encryption-pro/id935278498 (this page in markdown: same URL + `.md`)
- Developer: [Frantisek Dvorak](https://appshunter.io/developer/935278497)
- Category: Utilities, Social Networking
- Price: $3.99
- Rating: 4.70/5 from 52 App Store ratings · 55 written reviews indexed
- Age rating: 4+
- Requires: iOS 14.5 · 18 MB
- Languages: American English, Arabic, Dutch, French (France), German (Germany), Hindi, Italian, Japanese, Korean, European Portuguese and 4 more
- Released: 2014-11-25
- Data updated: 2026-08-27
- Monetization: paid
- User reviews in markdown: https://appshunter.io/ios/app/paranoia-text-encryption-pro/id935278498/reviews.md

## What is Paranoia Text Encryption PRO?

• Paranoia Text Encryption PRO is a universal text encryption application for iOS (iPhone/iPad/iPod) and macOS by Paranoia Works.
• Paranoia Text Encryption ensures the safety of your notes, SMS messages, emails, social networking posts, cryptocurrency keys (seeds, mnemonics), and any other text from all unwanted readers.
• The app offers true security, encrypting data using the strongest encryption algorithms available: Threefish 1024-bit, SHACAL-2 512-bit, Paranoia C4 2048-bit (a cascade of Threefish, Serpent, AES, and SHACAL-2), Blowfish 448-bit, AES 256-bit, RC6 256-bit, Serpent 256-bit, and Twofish 256-bit ciphers.
• Simply copy and paste text to and from your favorite applications, or save it to a file for future use.
• This app does not function as a "Vault application." Instead, a password is set for the current encryption/decryption session, not for entering the app itself. You may have an unlimited number of passwords for any purpose—different files, tasks, people, etc.
• Steganography: The application offers steganographic features, allowing you to conceal text or files within a JPEG image. Two algorithms are available: J-UNIWARD (content-adaptive, minimizes visual distortion, harder to detect) and F5 (matrix encoding, efficient embedding). The selected algorithm works with your chosen symmetric cipher to create the final steganogram.
• Key Encapsulation (KEM): Securely exchange encryption passwords using the post-quantum ML-KEM mechanism (NIST FIPS 203). Two parties can establish a shared password without ever transmitting it directly, with protection against future quantum computer attacks.

◆ Differences between Free and PRO versions: The PRO version offers additional encryption algorithms, specifically Threefish 1024-bit, SHACAL-2 512-bit, and Paranoia C4 2048-bit (a cascade of Threefish–Serpent–AES–SHACAL-2). While the free version can decrypt data encrypted by these advanced algorithms, the ability to encrypt data using them is exclusive to the PRO version. The PRO version also provides a key to activate the PRO versions of our desktop applications: Paranoia File & Text Encryption for PC, Paranoia Text Encryption for PC, and S.S.E. File Encryptor for PC.

• The application is directly compatible with macOS (10.15 and later). Versions for other systems and platforms are available on the application's homepage (download section - https://paranoiaworks.mobi/download/).
• An online (web-based) version, utilizing AES and client-side JavaScript, and other utilities are available at https://pteo.paranoiaworks.mobi

## Key features

- Multiple strong encryption algorithms
- Steganography for image data hiding
- Post-quantum key encapsulation (KEM)
- Unlimited password management
- Cross-platform compatibility (iOS, macOS)
- Copy/paste and file saving

## Recent user reviews (10 of 55)

All indexed reviews: https://appshunter.io/ios/app/paranoia-text-encryption-pro/id935278498/reviews.md

### 5/5 — Really well done!

*2026-06-11, version 3.12*

At last! A really good encryption system that works on both my iPad and Android device! It's straightforward, fast and secure and just works. Good choice of encryption too. I bought the Pro licence as this one will be a keeper.

### 5/5 — Justo lo que necesitaba

*2025-11-26, version 3.10*

Justo lo que estaba buscando

### 5/5 — Good app

*2025-07-02*

This does everything I need. Though, despite it being a good app, it’s not open source which somewhat makes me… paranoid. I can’t inspect and verify myself. But besides that, it’s ok.

### 5/5 — Easy to use cross-platform encryption

*2025-03-15, version 3.8*

HIgh grade security that's very easy to use.  In addition to this Mac app, there's a corresponding app on iOS, Android, Windows and Linux.  Well worth the small cost.

### 5/5 — La mejor encriptando TXT

*2024-10-26, version 3.9*

Hace años que la utilizo. Muy buena App.

### 5/5 — Superior encryption app!!

*2024-09-13*

I have no issues with the app itself. I just have one issue with family sharing. 
How do I share the app when the only way to get the app on my family members device is to download from the App Store which in turn will charge me anyway. 
Please help.

### 5/5 — Amazing app!!

*2024-04-11*

This is truly one of the most amazing and useful apps I own.  It works flawlessly and provides a level of security not found in any other similar app.  I also find it to be highly flexible regarding importation and exportation of data, albeit for some there may be a slight learning curve.  The fact it integrates with the online versions and across multiple device platforms is very useful considering secrets may need to be shared between devices.  I cannot say enough about my love of this app, and it’s a steal considering the low one-time fee.

### 4/5 — Very good but missing some few features

*2024-04-09*

Encryption is superb and with two new features the interface would be up to it: 
 1- A PIN (apart from the session pw) to lock the app, so the encryption password (session pw) does not need to be cached. 
2- Auto erase of the log/history at the bottom of the app, showing the name of the last opened file, after the user resets the session pw.

### 5/5 — Five Star Encryption

*2023-06-02, version 3.9*

This encryption app lives up to the company name with numerous high-grade symmetric encryption options including steganography.  It’s also cross-platform (Android, iOS, Windows, Mac, Linux) and has additional utilities such as a password generator.  Big thumbs up.

### 5/5 — Very handy and well done

*2023-02-25*

Well thought out app with great options. Thanks for maintaining this and the web version. 

One thing that would be nice is if could save session passwords in keychain to make it easier for some people to use.

## Frequently asked questions about Paranoia Text Encryption PRO

### What does Paranoia Text Encryption PRO do?

This application provides robust text encryption for various data types, including notes, messages, emails, and cryptocurrency keys. It utilizes a wide array of strong encryption algorithms to ensure the safety of your information from unwanted readers.

### What are the key features of this app?

Key features include support for numerous advanced encryption algorithms (like Threefish 1024-bit and Paranoia C4 2048-bit), steganography to conceal text within JPEG images using J-UNIWARD or F5 algorithms, and post-quantum Key Encapsulation (KEM) for secure password exchange.

### How much does Paranoia Text Encryption PRO cost?

This application is a paid application. The PRO version unlocks additional encryption algorithms and features not available in the free version, and also provides keys for desktop application PRO versions.

### What devices is this app compatible with?

The application is directly compatible with iOS devices (iPhone, iPad, iPod) and macOS (version 10.15 and later). Versions for other systems and platforms are available on the developer's homepage.

### How can I use this app to protect my data?

You can use this app by copying and pasting text directly into it for encryption, or by saving encrypted text to files. It's ideal for securing sensitive notes, messages, emails, social media posts, and critical information like cryptocurrency seeds.

## Version history (last 5 releases)

### 3.14 — 2026-07-27

• Help updated;

### 3.13 — 2026-07-02

• The Steganogram dialog has been extended to display the maximum capacity for embedded data in the steganogram.
• The File Encryption app is now newly available for macOS on the Apple App Store, alongside the previously released iOS version.

### 3.12 — 2026-04-20

• Added Dutch localization and updated help documentation.
• Added an "Export as URL" option.
• New compatible web apps are available at: https://pteo.paranoiaworks.mobi

### 3.11 — 2026-04-07

• New steganographic algorithm: J-UNIWARD — content-adaptive embedding that minimizes visual distortion and is harder to detect. The classic F5 algorithm remains available.
• File steganography: You can now encrypt and hide files (not just text) inside JPEG images.
• Key Encapsulation (KEM): Securely exchange encryption passwords using post-quantum ML-KEM (NIST FIPS 203). No password is ever transmitted directly.
• Base62 output encoding option added.
• Cross-app password sharing: Send KEM passwords directly to other installed Paranoia apps.
• New compatible web apps are available at: https://pteo.paranoiaworks.mobi/

### 3.10 — 2025-05-09

• Added localizations for German, French and Italian;

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## More apps by Frantisek Dvorak

- [Paranoia Text Encryption Lite](https://appshunter.io/ios/app/paranoia-text-encryption-lite/id1092955070)
- [Paranoia File Encryption Lite](https://appshunter.io/ios/app/paranoia-file-encryption-lite/id6449292954)
- [Paranoia File Encryption PRO](https://appshunter.io/ios/app/paranoia-file-encryption-pro/id6449606072)

All apps by Frantisek Dvorak: https://appshunter.io/developer/935278497

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-08-27.*