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What’s New

Threema 4.9.3 for iOS

  • If a vote in a poll was changed, this will be reflected in the generated system notification
  • Other improvements and minor bug fixes

Threema 4.9.2 for iOS

  • Fixed a crash that could occur when opening the app
  • Fixed a bug that could occur when sending video messages

Threema 4.9 for iOS

  • Support of the new communication protocol “Ibex
  • Send and receive messages with Perfect Forward Secrecy
  • New chat overview
  • Unknown chat members will no longer automatically be added to the contact list
  • Manage storage now on a per-chat basis
  • Send videos in original quality
  • Various other improvements for upcoming features

Threema 5.0.3 for Android

  • Video preview is now seekable
  • Improved precision when trimming videos
  • Minor improvements and bug fixes

Threema 5.0.2 for Android

  • Group call notifications now respect the “Do not disturb” setting
  • Minor improvements and bug fixes

Threema 5.0.1 for Android

  • Minor improvements and bug fixes

Threema 5.0 for Android

  • New: end-to-end encrypted group calls (audio and video)
  • New: agree/disagree feature also available in group chats
  • New: edit received images on the fly and send them right back (tap and hold > pencil icon)
  • New: send and receive messages with Perfect Forward Secrecy
  • Support for new chat server protocol
  • Minor bug fixes
  • Security improvements:
    • Improve chat server authentication protocol to prevent a payload confusion and a theoretical replay issue
    • Introduce an additional warning message if a connection from another device using the same Threema ID has been detected since the last time that the app was used
    • Disable compression of Threema Safe backups to rule out the theoretical possibility of a compression oracle
      Thanks to Kenny Paterson, Matteo Scarlata and Kien Tuong Truong of the Applied Cryptography Group at ETH Zurich for bringing these issues to our attention

Threema for Desktop 1.2.27

  • Miscellaneous minor improvements and bug fixes

Threema for Desktop 1.2.25

  • Miscellaneous minor improvements and bug fixes

Threema for Desktop 1.2.21

  • Miscellaneous minor improvements and bug fixes

Threema for Desktop 1.2.18

  • Miscellaneous minor improvements

Threema for Desktop 1.2.13

  • Miscellaneous minor improvements and bug fixes

Threema for Desktop 1.2.7

  • Miscellaneous minor improvements and bug fixes

Threema for Desktop 1.2.5

  • macOS: File attributes are set correctly on downloaded files
  • Miscellaneous minor improvements and bug fixes

Threema for Desktop 1.2.0

  • macOS: Improved support for Apple processors
  • Linux: Fixed an issue where the app icon was missing in some cases
  • Linux: The rpm package is now signed (https://threema.ch/en/faq/rpm_signature)
  • Miscellaneous minor improvements and bug fixes

Threema Web 2.3.0 Säntis

  • Sending files up to 50 MB
  • Support for https://threema.id/ URLs
  • Graphical password strength indicator
  • Updated emojis to 12.1, and skin tone selector support

See all changes on GitHub.