# CrypTool > Educational app for learning and experimenting with ciphers and message concealment. (iPhone/iPad app by Arthur Guiot.) - Source: https://appshunter.io/ios/app/cryptool/id1392983460 (this page in markdown: same URL + `.md`) - Developer: [Arthur Guiot](https://appshunter.io/developer/1392983459) - Category: Utilities, Developer Tools - Price: Free - Rating: 3.00/5 from 3 App Store ratings · 4 written reviews indexed - Age rating: 4+ - Requires: iOS 13.2 · 2 MB - Languages: American English - Released: 2018-07-07 - Data updated: 2026-06-10 - Monetization: free - User reviews in markdown: https://appshunter.io/ios/app/cryptool/id1392983460/reviews.md ## What is 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. ## Key features - Learn cryptography concepts - Implement ciphers in programming languages - Complete interactive challenges - Experiment with message concealment - Explore various implemented ciphers ## Recent user reviews (4 of 4) All indexed reviews: https://appshunter.io/ios/app/cryptool/id1392983460/reviews.md ### 3/5 — Interesting and fun to use *2024-02-01* Great choices of encryptions to learn but I honestly would enjoy this more if there was an option to use and learn the bifid cipher ### 1/5 — Doesn’t work For iPhone 12 *2022-08-05, version 2.0.1* Can’t copy the encrypted text for some reason on iPhone. The text gets encrypted but its impossible to copy the encrypted text. Probably a simple fix but super annoying and is making the app useless ### 1/5 — Cipher portion unusable on smaller iOS device like iPod touch 7th gen *2020-06-30, version 2.0.1* This review is based on observations made while running the app on an iPod touch 7th gen running iOS 13.5.1. The problem described likely occurs on all iOS devices with an equivalent display size. While using the encryption portion of the app (ciphers), all the controls overlap each other making it entirely impossible to use. After some exchanges, the dev is simply ignoring the problem ... I wish I could downgrade. The previous version was working just fine ... ### 3/5 — Not sure what's going on *2020-03-07* I really like what's provided on this app, the only problem is when I type in the correct answer it doesn't do anything. I’ve checked my answers with the provided cipher section and they are right, but it doesn't do anything when I type it into the answer bar. Weirdly enough it did tell me I was right for the emoji one, just none of the others. If this gets fixed I will change my review to five stars because it is a great app. **Developer response:** Sorry for the late answer, but it's now fixed. Thank you for letting us know. ## Frequently asked questions about CrypTool ### What is CrypTool used for? CrypTool is an educational application designed to help users understand and experiment with ciphers and the art of hiding message content. It focuses on the principles of cryptography rather than secure communication. ### Is CrypTool free to use? Yes, CrypTool is available for free. There are no in-app purchases or advertisements within the application. ### What devices does CrypTool support? CrypTool is available on Mac, iPhone, iPad, and iPod devices, allowing users to learn cryptography across multiple Apple platforms. ### What is the age rating for CrypTool? CrypTool has an age rating of 4+, making it suitable for a wide range of users interested in learning about ciphers. ### How often is CrypTool updated? The latest version of CrypTool is 2.0.1, and it was last updated on June 18, 2020. Future updates will continue to implement new ciphers. ### Does CrypTool teach secure communication? No, CrypTool explicitly states that it does not teach security or provide a way to communicate securely. Its focus is on the basics of ciphers and message concealment. ### What kind of learning experience does CrypTool offer? CrypTool offers a fun learning experience through interactive challenges that encourage users to think and apply cryptographic principles. It implements most ciphers directly within the app. ### What is the user sentiment for CrypTool based on ratings? CrypTool has a rating of 3.0 stars based on 3 ratings. This indicates a mixed user reception, suggesting some users find it valuable while others may have encountered limitations. ## Version history (last 5 releases) ### 2.0.1 — 2020-06-18 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. ### 2.0 — 2020-06-17 All-new design, bug fixes, and more! ### 1.1.2 — 2018-06-13 Added a 'done' button to dismiss the keyboard on the ciphers page. ### 1.1.1 — 2018-06-09 Now supporting iOS 9 and above ### 1.1 — 2018-06-07 Added a small splash screen on the ​first launch ## More apps by Arthur Guiot - [StudIO - Code](https://appshunter.io/ios/app/studio-code/id1452038669) - [Euclid - Calculator](https://appshunter.io/ios/app/euclid-calculator/id1532099156) All apps by Arthur Guiot: https://appshunter.io/developer/1392983459 --- *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 2026-06-10.*