Crypto Messenger - Encrypted Private Messaging

Contains adsIn-app purchases
178 reviews
Content rating
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About this app

Crypto Messenger is end-to-end encrypted messaging application. It's a part of my Cryptography application and all its workings are describe at my website. It's not intended to replace any bigger messaging applications. You can find link to documentation at app's about dialog.

Understanding the bigger picture
Don't use Crypto Messenger if you use it for normal chatting just like instant messaging platforms. Don't use this app if you require that your conversation messages stays stored forever or long time during to update flow. I cannot guarantee that conversations stay active for ever, so have a backup route to give your recipient a new uid other way. Use Crypto Messenger if your requirement is to send true end to end encrypted messages without need to really store messages forever. Think Crypto Messenger like messaging that "never took place". Crypto Messenger is working as a true working demo for my Cryptography application.

Main features
• No any logins or any user credentials needed.
• End-to-end encrypted.
• AES algorithm for encrypting messages.
• RSA algorithm for exchanging AES key.
• RSA keys are changeable by user.
• You can choose RSA key size and also view them as Base64.
• Minimal permissions needed.
• Check for new recipients feature.
• Add recipients via QR codes.
• Kill switch feature to delete all your records at one go.
• Long click message to copy it into clipboard.
• Vibration as feedback. You can toggle off at settings.
• Paste into message field fast via right corner menu button.

• Camera due QR code reading feature. Asked when needed.

Pin code view:
- ChaosLeong,

Old android users
30/9/2018 stopped supporting Kitkat. Must have >= Lollipop OS.

You should read more here:
Updated on
Nov 8, 2020

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
This app may share these data types with third parties
No data collected
Learn more about how developers declare collection
Data is encrypted in transit
You can request that data be deleted
178 reviews
A Google user
April 27, 2019
I love the app and find it very useful however I was wondering if there is an apple version which will allow me to communicate to people with IPhones through the app
7 people found this review helpful
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April 28, 2019
Unfortunately theres no apple version and not in planning any time soon. I fear I dont get this kind of an app to their store due harder policies.
A Google user
December 17, 2018
Excellent but i need recommend friends in this app like social media who are intrastated in cryptography so please add that feature and chat so we learn faster please
16 people found this review helpful
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December 17, 2018
I am not implementing chat where people can chat with each other cause I am responsible for content shared in there. I had to for example delete user puzzles feature cause people bloated the whole feature is innapropriate content. Did I understand your point right?
Tyler Strenge
November 29, 2021
Used to be good, but now doesn't work, keeps saying it couldn't get unique ID from server
3 people found this review helpful
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November 29, 2021
Server side process got stuck. Should be fine now.

What's new

• New major 3.x.x release.
• New back end.
• Newer dependencies.
• Prepared for future developments.
• Spanish translation.
• In app billing support to remove ads.
• Tap to show message, security feature.