Threema. The Secure Messenger

What is Threema. The Secure Messenger?

Threema. The Secure Messenger is a messaging app for Android published by Threema AG. It falls under the Communication category on Google Play and is built around private one-to-one and group chats.

The app has been installed more than 6,392,291 times, and it is listed on Google Play at a price of $7.49 with no ads and no in-app purchases.

How does Threema. The Secure Messenger work?

Like other messengers, the app lets you send text and files to contacts and join group conversations. Its main selling point is privacy: the developer positions it as a way to keep conversations away from third parties.

Because it is a paid app with no ads or in-app purchases, there is no advertising layer or extra purchase prompt to deal with while you chat.

What is new in version 6.5.3?

Version 6.5.3, released on 2026-09-22, focuses on reliability. It corrects a problem with automatic file downloads, makes contact synchronization work better, and includes several smaller bug fixes.

If you have noticed files not arriving on their own or contacts syncing unevenly, updating through Google Play is the simplest step.

Does Threema. The Secure Messenger cost money or contain ads?

The app has a one-time listed price of $7.49 on Google Play. It has no in-app purchases and no advertisements, which many users see as an advantage over free messengers funded by ads or upsells.

The main trade-off is the upfront cost. Free alternatives exist if you do not want to pay.

Android requirements and download size

Threema. The Secure Messenger requires Android 7.0 or later. Check your device version in settings before buying, since older phones will not be able to install it.

The current version is 6.5.3. Google Play shows the download size for your device, so check there for the exact figure.

Pros and cons

On the plus side, the app is ad-free, has no in-app purchases, and is aimed at privacy-minded users. The install base is large, with more than 6.3 million installs.

On the downside, the Google Play rating is 3.9 out of 5 from 75,679 ratings, which is a moderate score. The app also requires a purchase, and it needs Android 7.0 or later.

Who is it for?

The app suits people who want a private messenger and are willing to pay once instead of relying on ads or data-focused free services. It may be less suitable for users on very old Android devices or those who want the cheapest possible option.