Threema. The Secure Messenger
Threema GmbH
Download price only. In-app purchases and subscriptions may cost extra.
- Developer
- Threema GmbH
- Version
- 7.3.3
- Minimum iOS
- 17.0
- Age rating
- 4+
- App Store rating
- 4.25 / 5 (707)
- App languages
- BG, CS, NL, EN, FR, DE, IT, JA, KO, PL, PT, RU, ZH, SK, ES, ZH, TR, UK
App Store region: United States · Checked: Sep 20, 2026
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About this app
Threema is the world’s best-selling secure messenger, used by more than 12 million people in over 175 countries, developed in Switzerland, and designed with privacy and data protection in mind. Whether chats, calls, or files, everything is end-to-end encrypted, and no data trail is left behind. Instead of a phone number or email address, a randomly generated Threema ID serves as a unique identifier – anonymous and secure. Threema protects what really matters: your privacy. Advantages of Threema: • Text and voice messages, including emoji reactions • End-to-end encrypted voice, video, and group calls • Location sharing • Sending files in all formats (PDF, GIF, MP3, ZIP, and more) • Ability to edit sent messages and delete them for chat partners • Desktop app and web client for convenient chatting on your PC • Group creation and polls • Light or dark mode • No ads, no trackers, no data collection • Identity verification of contacts by scanning their QR code Reliable security: • Open source and regular audits • Servers in Switzerland • Anonymous use possible: no phone number or email address required • Messages are deleted from the server immediately after delivery Do you have any questions or problems? Our FAQ can help: https://threema.com/support Enjoy using Threema!
What’s new
• Fixed a bug that could cause the app to freeze upon launch Threema 7.3.2 • Various improvements and bug fixes Threema 7.3.1 • Fixed a crash that could occur during 1:1 calls • Fixed a bug in relation to forwarding messages • Other improvements and various bug fixes Threema 7.3 • Various UX improvements • Improvements in relation to the logging system • Improved video converting when “Original” is selected as the quality • Memory and performance improvements when handling large files • Improvements in relation to Threema calls • Fixed a bug in relation to group chat notifications • Fixed a possible bug that could occur when encoding URLs • Fixed a bug in relation to voice messages • Other improvements and various bug fixes