Mattermost

4.4
17.4K reviews
1M+
Downloads
Content rating
PEGI 3
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About this app

Requires Mattermost Server v10.5.0+. Older servers may not be able to connect or have unexpected behavior.

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Mattermost is secure workplace messaging from behind your firewall.

- Discuss topics in private groups, one-to-one or team-wide
- Easily share and view image files
- Connect in-house systems with webhooks and Slack-compatible integrations

To use this app, you need a URL for a Mattermost server.

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Host your own server: https://about.mattermost.com/download

Terms of Service: http://about.mattermost.com/terms/

Contribute to the project: https://github.com/mattermost/mattermost-mobile
Updated on
Oct 16, 2025

Data safety

Safety starts with understanding how developers collect and share your data. Data privacy and security practices may vary based on your use, region, and age. The developer provided this information and may update it over time.
No data shared with third parties
Learn more about how developers declare sharing
This app may collect these data types
Personal info, Messages and 3 others
Data is encrypted in transit
Data can’t be deleted

Ratings and reviews

4.3
16.9K reviews
Gedeon d'Abreu de Paulo
March 29, 2024
Very frustrating app to use. When it works, it works well. Unfortunately, there are many problems, some of which make it almost unusable at times. Others have already mentioned messages not appearing at times. I also encounter issues with the replies not appearing after pressing a message unless I keep pressing it multiple times. Even when I finally open the replies, I can't read them because the app sometimes automatically scrolls back to the bottom of the thread everytime I try scrolling up.
2 people found this review helpful
Did you find this helpful?
Mattermost
April 1, 2024
Hi there, what Mattermost server version are you on? Does clearing the cache or uninstalling and re-installing the app help? Do you see any errors either in the server logs or in the mobile app logs?
Matej Havelka
August 29, 2023
I have been using this app for over 2 years and it never worked properly, but this last update made it impossible to use: - The servers will not load and the app says it can not connect to them, meaning I can access channels only if someone writes in them - It usually takes at least 5 minutes until a single response on a thread is loaded, on a normal speed wifi connection - I am unable to react to messages I do enjoy using the browser site, there it works flawlessly.
Did you find this helpful?
Mattermost
August 30, 2023
Hi there, do you see anything strange in the logs (profile -> settings -> report a problem)? Do you have collapsed reply threads enabled or disabled? Does reinstalling the app help? What Mattermost server version are you on?
Purity Light
September 8, 2025
terrible application, notifications with long delay even if did read on desktop. Freezes while using need to force stop and reopen. Can't find user by name lol. F U MM
Did you find this helpful?
Mattermost
September 8, 2025
Hi there, can you help with more details on reproduction steps and your Mattermost server version? Feel free to open a new issue with details at https://github.com/mattermost/mattermost-mobile/issues.

What’s new

Requires Mattermost server v10.5.0+ to avoid incompatibilities and crashes. Requires Android 7.0 or higher.

- Added checklist item options for playbooks.
- Added the ability to edit slash commands on playbooks tasks.
- Added the ability to update the due date on playbook tasks.
- Added the ability to edit the owner and the task assignee on playbooks.
- Added support for permalink previews on mobile.
- Added various bug fixes.