Improved Spam Reporting for Android and iOS

Spam reporting has been improved based on feedback from the Survey feed. You can now report single and group chats as spam across all mobile platforms.

Unfortunately, spam is still a problem all over the Internet. Since Threema isn’t free and spammers can’t create an unlimited number of IDs, they can’t run wild on our service. However, Threema users aren’t completely spared, either. That’s why, alongside the option to block unknown contacts, you can now also report spam chats. On Android, this has already been possible for single chats. On iOS, the feature is brand new.

If Threema flags a new single or group chat as possible spam based on certain criteria, you’ll see a notice when you open it. There, you can choose:

• Report: Report the chat as spam and stay in it.

• Report, block, and delete: Report the chat as spam, block the sender or group creator, and remove the chat from the chat overview.

The banner will disappear as soon as you tap “Not Spam” or send a message or file. Reacting with an emoji or joining a group call will not make it disappear.

The notice also goes away once Threema no longer flags the chat as spam. This is the case, for example, after you verify the contact via QR code.

Feedback from the Survey Feed

Threema doesn’t collect any data on how the app is used. While this protects your privacy, it also has a downside. We can’t tell on our own what you’re missing or what bothers you.

That’s why, in mid-2026, we launched the Survey Feed in the Threema Channel. There, we regularly conduct short surveys and ask questions about upcoming features directly in the app. We asked you about your preferences for spam reporting and took your answers into account when developing the feature.

Would you like to help shape the future of the Threema apps? Subscribe to the “Survey” feed in the Threema Channel.

You can also send us your ideas and suggestions anytime using the feedback form.