Cryptool has been downloaded 69 thousand times. In the last 30 days, the app was downloaded 220 times.
User Ratings
Cryptool is rated 4.25 out of 5 stars. The rating is based on 240 ratings.
App Information
Cryptool is FREE to download. The APK download size is 13.81 MB. The latest version available is 3.2.3. The last update was on August 23, 2025.
Technical Requirements
Cryptool requires Android 6.0+ or higher. The app has a content rating of Everyone. The app has been available on Google Play October 2017.
Description
Cryptool wants to help you to protect the information that matter most to you. We don't hide anything that's going on under the hood, we show the algorithms and data input/output as it is.
This is a non-profit open source solution and we are not interested in your data. Anyway, we do not ask you to trust, we ask you to **block** the Internet access, **review** the code, or even **build** the app yourself.
Main features:
- Lightweight application. - Modern UI. Material You + support to light/dark theme. - Multiple encryption configurations as conversations. - Multiple message sources. - Manual. Handle the input and output of the communication yourself. - LAN. Communication within the connected Local Area Network. It is forgotten when the app stops. - File. Use two files for communication. You can auto-sync and share the files for real time communication. - SMS. Use your SMS provider. This option could have cost depending the contract with your provider. - Keystore. - Multiple algorithms and encryption configurations. - Interoperable encryption. - Clipboard control. - Export/Import: - Custom code protection. - Filter data. - Access code protection: - Forget/Reset. - Change. - Biometric identification.
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Great app. Though. We use Android and Windows together more and more
though, so it would be really useful if there was a simple compatible
Windows app.
★★★★★Stan The Man· Apr 21, 2026
This is fantastic tool. In this day and age Open Source app is always welcomed. By the way THANK YOU for GitHub SMS version. Keep up the good work 👍
★★★★★Giuseppe C· May 21, 2018
It's fine. I don't know if it does cypher other than AES with 256bit keys,
though.
★★★★★Technical SharmaJi· May 19, 2020
Best tool ever. Love it... But a little bit slow... Do some work on this app. To correct RC4.
★★★★★Mr. Hitchens· Jun 28, 2021
Really good tool. Needs an update! Very useful and well-designed. Recommend highly! PS, Instagram User...... seriously, if you don't understand how something works, that's YOUR fault! Read!
★★☆☆☆Instagram User 333.01· Dec 9, 2020
Quite useless. No way to really decipher either message with an external source. Only useful for yourself which is kinda sad, as I wanted to use this to make puzzles for other people. Oh well.
★☆☆☆☆Bob A· Jun 29, 2024
AGAIN, "AES BANK GRADE/MILITARY" IS NSA BACKDOOR. M/AS WELL EAT BUGS W/THESE ALGOS. NOTHING SHOULD BE "REACHED FOR" AT THE TOP OF ANY APP, OTHER THAN COPYING SPECIFIC TEXT. ALL CONTROLS AT BOTTOM & ABOVE KEYBOARD. AMAZED U KNOW WHAT SCREEN PROTECTION IS, A LEGIT SIGN OF HOPE👉✅. ANONYMOUS MESSENGER IS A 🏆 STANDARD GUIDE IN SEVERAL AREAS. COPY/PASTE FROM REAL ENCRYPTION, SECURES CLIPBOARD & LAYERS CURRENT VERIFIED APP ENCRYPTION, ALSO HEDGES AGENT UPDATED DECODES. YOUR MANIFEST IS UNACCEPTABLE.
★★☆☆☆Ali pooresmaeel· Nov 15, 2024
It is difficult to read the message and the received message cannot be decoded in the program.
Google Play Rankings for Cryptool
This app is not ranked
Technologies used by Cryptool
Cryptool is requesting 6 permissions and is using 11 libraries.
Each subscription will automatically renew 3 days before the expiration date for
the same time period. Subscriptions can be cancelled at any time before the renewal.
Android Jetpack core
Kotlin
Realm