Threema

Threema Threema is a privacy-focused instant messenger for Android with encrypted chats and secure calls. Use a unique ID (no phone number or email), message worldwide contacts, share files, and join group chats.

Threema

Threema is an instant messaging app designed with privacy and security at its core. You don’t have to share your phone number or email address—each user gets a unique ID generated by the app.

You can add contacts from more than 175 regions and countries and chat in many ways, including text, emoticons, voice, video, and other file sharing options. It’s built for connecting with friends who care about their online safety.

The app is completely ad-free and is designed not to collect users’ private data or chat logs. It also reviews user profiles regularly and helps protect account security to support a safer messaging experience.

Key Features

Encrypted Chats

All messages and calls are encrypted, helping prevent others from intercepting your data or reading your private conversations without permission. For maximum protection, make sure end-to-end encryption is enabled in your chat settings.

Secure Audio & Video Calls

You can place secure video and voice calls with friends. It also supports conference calls, allowing up to 16 participants in a single call.

Create & Run Polls

Can’t agree on something? Start a poll inside a group so everyone can vote on personal decisions. Polls can help you settle things like choosing a movie, picking a place to visit, or deciding who should pay the bills.

Group Chats

Threema supports group conversations with many close friends. In group chats, you can share messages, videos, and stickers to keep discussions lively.

Multiple Themes

You can switch between various themes from the settings menu. The app includes around a dozen downloadable designs, plus light and dark modes so the messenger matches your preferences.

What Users Say

• Privacy and reliability: One reviewer says it works well and feels secure, but at first they missed features such as automatic disappearing messages and emoji reactions.
• Storage management improvements: Update notes mention that storage management now includes auto-deletion of messages based on age.
• Emoji reactions added: Another update notes that emoji reactions were introduced, bringing more of the small “favorite” features into the app.
• Account recovery concern: A user reports being locked out and asked to provide a passphrase they don’t remember setting up, then asks how to recover access.



• Long-term satisfaction: Multiple reviewers praise Threema’s ongoing improvements and highlight that it keeps adding features while maintaining encryption and security.



• Self-destructing messages (optional): One review notes the app lacks self-destructing messages, but also cautions that reliability depends on how you use the app and what you send.

FAQ

What makes Threema safe and secure?

Threema Safe encrypts backup data using the password you set. It then derives cryptographic keys from that password to protect your backup information.