Threema. The Secure Messenger

Threema. The Secure Messenger

By Threema GmbH

  • Category: Social Networking
  • Release Date: 2012-12-28
  • Current Version: 4.8.4
  • Adult Rating: 4+
  • File Size: 60.24 MB
  • Developer: Threema GmbH
  • Compatibility: iOS 15.0+
Score: 4.3
From 292 Ratings


Threema is the world’s best-selling secure messenger and keeps your data out of the hands of hackers, corporations, and governments. The service can be used completely anonymously. Threema is open source, allows to make end-to-end encrypted voice and video calls, and offers every feature one would expect from a state-of-the-art instant messenger. With Threema Web, you can also use Threema from your Desktop. PRIVACY AND ANONYMITY Threema is designed from the ground up to generate as little data on servers as possible. Group memberships and contact lists are managed on your device only, and never stored on our servers. Messages are immediately deleted after they have been delivered. Local files are stored encrypted on your mobile phone or tablet. All this effectively prevents the collection and misuse of your personal information, including metadata. Threema is fully compliant with the European privacy legislation (GDPR). HIGHEST ENCRYPTION STRENGTH Threema encrypts ALL your communications END-TO-END including messages, voice and video calls, group chats, media files and even status messages. You can rest assured that only the intended recipient can read your chats, and nobody else – not even us. Threema uses the trusted open source NaCl cryptography library for encryption. The encryption keys are generated and safely stored on users’ devices to prevent backdoor access or copies. COMPREHENSIVE FEATURES Threema is not only an encrypted and private messenger but also versatile and feature-rich. • Write text and send voice messages • Make voice and video calls (requires iPhone 5s / iOS 10 or above) • Share videos, pictures and locations • Send any type of file (pdf, animated gif, mp3, doc, zip, etc.) • Use Threema Web to chat from your Desktop • Create groups • Conduct polls with the poll feature • Choose between a dark and a light theme • Quickly and silently reply with the unique agree/disagree feature • Verify the identity of a contact by scanning their personal QR code • Use Threema as anonymous instant messaging tool • Synchronize your contacts (optional) SERVERS IN SWITZERLAND All our servers are located in Switzerland, and we develop our software in-house. FULL ANONYMITY Each Threema user receives a random Threema ID for identification. A phone number or email address is not required to use Threema. This unique feature allows you to use Threema completely anonymously – no need to give up private information or to open an account. OPEN SOURCE AND AUDITS The source code of the Threema app is open for everyone to review. On top of that, renowned experts are regularly commissioned to conduct systematic security audits of Threema’s code. NO ADS, NO TRACKERS Threema is not financed by advertising and does not collect user data. SUPPORT / CONTACT For questions or problems please consult our FAQs:


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Good privacy but quite some deficiencies

In general, it is a good app with high privacy standards. But the web version is highly complicated. Every time I have to try several times to make it work. It is very annoying. I don’t know if that has to do with privacy but there should be a way that I can just login with my password and it works. Also, I had friends that changed their phones and had lots of trouble getting the messages. I think they even had to, make a new account. I don’t know if it was really necessary, but they couldn’t figure out any other way to make it work.
By freedom4u

Lack of Phone Support & No Detailed Instructions re Use

The Threema App maybe superior and it may offer unique features that other Apps don’t offer. Yet, as a non-IT person, the ability to get the appropriate functions working without more comprehensive support or written instructions is a significant short coming. Chats are available but to get the benefits up and working appear to be a major effort. Inquiries were made to Threema regarding the availability of written instructional materials; it appears they are not available.

easily doable features needed

We need to be able to delete messages from all devices similar to the app session. I’ve been sending all my friends $5 to convince them to join this app, I know it’s not much but I’ve bought about 8 accounts for people and that’s my only major complaint and why I still prefer session. If you can fix this I will be using this exclusively as will many people following me to the app.
By NotAShillstg69

Video messaging can’t compete with Marco Polo

I convinced my dating partner to give this app a try for video messaging instead of using Marco Polo. 5 of the first 7 messages she recorded couldn’t be processed and were deleted. She’s given up and the $5 I paid for her app are now up in 🔥s. Please do better.
By wcoast23

Absolutely great app

This app is great. It really proved itself to me when I stayed at a rental with restricted internet that disallowed photos from being sent over messenger. Their nosy internet settings couldn’t detect that I was sending photos with Threema. If you could add cropping to the in app camera (and other editing tools) that would be really useful.
By Waswhatwer

Nice App, but need emoticon support to text messages

The app is nice and secure but I find it difficult to react to people’s messages. I do not like to use the quote because it takes up to much space. Use something similar to Apple when reacting to a message. If everybody reacts to a message it takes up too much space on your display!
By Baxter's Reviews

I love this Messenger

For several years I use this tremendous messenger. My family and I are very satisfied with the service which Threema provides. For several years I use this tremendous messenger. The performance & privacy is excellent, fast, calls are excellent (clear) and the videos called . Threema for its price offers excellent product and service. Thank You ! Threema .
By Alert !

Stellar Messaging App!

App has been great for my family and I. We’ve all switched over to messaging, video calls etc, via Threema. However, like with any app, some shortcomings. For example, on iPhone 14 Pro Max the text input bar is pretty narrow. Makes it difficult to tap on it to begin messaging. Another issue is when accidentally recording a voice message there isn’t an actual cancel button, so you will record until you click stop then you have to click off that main window in order to get a notification box requesting deletion. Some minor nuisances however this review is constructive criticism I guess. Keep up the great work!
By Silicon@100%

Web Client

Threema says that due to Ios/Macos limits Web client can only be used with iOS app running on background. I wonder how Whatsapp can overcome this but Threema can’t.
By Mike3500

Delete for everyone

Add this feature
By ლუკი

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