Archived App (Last seen on 3 Jan 2026)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
About
Learn public key cryptography by generating and decoding encrypted QR codes with friends. Securely exchange secret messages using a pair of public and private keys, ensuring only intended recipients can read them. Explore cutting-edge encryption technology in a fun and interactive way.
What's New in Crypton
1.0.1
October 6, 2023
Updates the QR code image generated for cross platform compatibility.
Developer apps
FAQ
What is Crypton?
Crypton is a free utility app that allows users to learn about public key cryptography by generating and decoding encrypted QR codes for secure messaging with friends. It helps users understand how public and private keys work to protect communication.
How does Crypton ensure message security?
Crypton uses public key cryptography to secure messages. When a message is encrypted with a recipient's public key, only their corresponding private key can decrypt it, ensuring that even if the QR code is intercepted, the message remains unreadable to others.
Is Crypton free to use?
Yes, Crypton is completely free to download and use. The app is available at no cost to users, and it does not feature any in-app purchases or advertisements.
What devices does Crypton support?
Crypton is designed for iOS devices, specifically supporting iPhones and iPods. It is suitable for users looking for a secure messaging and cryptography learning tool on Apple's mobile platforms.
How often is Crypton updated?
The latest version of Crypton, 1.0.1, was released on October 6, 2023. While specific update frequency isn't detailed, the developer, Project Babbage, has provided updates since its release on May 22, 2023.
What is the age rating for Crypton?
Crypton has an age rating of 4+, making it suitable for a wide range of users. This indicates that the content is generally appropriate for children and adults alike.
Can I use Crypton offline?
The description does not explicitly state whether Crypton can be used offline. However, generating and decoding QR codes typically requires an internet connection for account setup and key exchange.
What are the benefits of using Crypton for learning cryptography?
Crypton offers a hands-on and interactive way to learn public key cryptography. By actively generating and decoding encrypted QR codes, users can gain practical experience with encryption concepts in a fun and engaging manner.
