SEchat (short for Secure Chat ) is a free, lightweight, open-source Android chat client. It is based on our old "Gnökien Chat App" (deprecated, but free to modify below) and highly adapted to the needs of this application.

I want to provide an opportunity to use a free and secure chat client. There are many of them out there at the moment, but most of them aren't completely open-source so you never know what they send apart from your messages.


  • Two public chatrooms where everybody can participate.
  • Private chatrooms with end-to-end encryption.
  • AES Encryption - based on the popular Crypto-JS.
  • Very small size (1.6 MB)
  • Free
  • Open-Source
  • No ads, no spyware, no bloatware - just a chat client.

Screenshot1 Screenshot2 Screenshot3 Screenshot4

This app does not collect any data at all! If you don't believe me, get the source code down below. It's written with App Inventor 2 which is so simple to understand, literally an eight year-old can program it - so don't hesitate to check it out! ;)

HOWEVER, if you have any privacy concerns, please feel free to ask me here.

OS: Android Only

Requirements: An internet connection for the chat service.

Version: 17.5.2

1.6 MB ( 1662970 bytes )

SHA256: 8d16ab0389f050e6723fd6d75bed1af368b3131ca41df25e7cf368c756afb9e4

Down here you can get every kind of source code you want. Why not have a look at the code and report some possible improvements? Or why not help making the encryption stronger?

Also there's the Gnökien Chat App - you can do whatever you want with that, I couldn't care less.

App Source Code
Gnökien Chat App (basis)



  • Important security improvements.
  • Bug fixes.


  • Small design changes.
  • Better responsive design.
  • Security improvements.
  • Bug fixes and optimizations.


  • Private chats are now much faster and more reliable!
  • The chat layout looks nicer and cleaner.
  • Landscape mode is now supported!
  • New loading animations looking much better.
  • Dropped chat timestamps (causing errors all the time).
  • Small changes to the overall design.
  • Many, many bug fixes and small improvements.