Apps in this category may contain mild or occasional cartoon, fantasy or real-life violence, as well as occasional or mild adult, sexually suggestive or horrifying content and may not be suitable for children under 9 years of age.

12+

Apps in this category may contain occasional mild indecent language, frequent or intense cartoon or real-life violence, minor or occasional adult or sexually suggestive material, and simulated gambling, and may be for children under 12 years of age.

17+

You must be at least 17 years old to access this App.

Apps in this category may contain frequent and intense offensive language; Frequent and intense cartoon, fantasy or realistic violence: frequent and intense adult, scary and sexually suggestive subjects: as well as sexual content, nudity, tobacco, alcohol and drugs, may not be suitable for children under 17 years of age.

CrypTool Screenshots

iPad

iPhone

About CrypTool

This is the official app of CrypTool, an organization that is supposed to explain and implement ciphers in several programming languages, to help people understand and create new ciphers. We don't teach security but the art of hiding the content of a message.

With this app, you'll be able to learn cryptography in a fun way, by completing challenges that are just the right level to make you think a little bit.

Most of our ciphers are already implemented in this app, and we'll keep implementing new ones.

Our app is not, in any case, a way of communicating securely, security is not our goal. We simply teach the basics, and we let users experiment with ciphers.

What's New in the Latest Version 2.0.1

Last updated on Jun 18, 2020

Old Versions

Some users reported that the UI was unusable on new iPhones. We're sorry for this bug. What happened is that we released the wrong build... It's now fixed and shouldn't happen ever again. Thank you for your comprehension.

Version History

2.0.1

Jun 18, 2020

2.0

Jun 17, 2020

All-new design, bug fixes, and more!

1.1.2

Jun 13, 2018

Added a 'done' button to dismiss the keyboard on the ciphers page.

1.1.1

Jun 9, 2018

Now supporting iOS 9 and above