"Mattermost Classic" is the original mobile app for Mattermost. For our newer second generation mobile apps, look for "Mattermost" on the App Store.

To use this app, you need a "Server URL" from a Mattermost server v3.0+.


Mattermost is secure workplace messaging from behind your firewall.

Host your own server:

Terms of Service:

This is a reference implementation of an open source Mattermost iOS app available at:

What's New

Version 3.10.3

- Various bug fixes
- Support for servers with APIv3 disabled

Ratings and Reviews

Suddenly can’t send message


Out of the blue the return key on my iPad adds a new line instead of sending my message. It’s always been slow and buggy. I don’t understand why this app is so bad.

Not the app you're looking for


Imagine the titillating experience I had while setting up MatterMost on my server and enjoying the chains of propriety bondage be ripped away as I could host my own version of Slack. Now imagine the complete and utter sadness that was brought before me when I installed this app.
I was able to login and just for one second, I felt as happy as an overweight sysadmin could feel before everything was ripped away. I found myself logged out. I had a mere glimpse into my team's default room, only to be immediately logged out. This feeling is all too common- rejection. Yet again, I have gotten my hopes up and what do I receive in return?
Thanks, MatterMost. You reminded me what matters most in life- the fact that I can never obtain happiness so my existence is left to be nothing more than a underpaid sysadmin with a white stained office chair.

Just like the browser experience


Works as advertised, just like the browser version.


Mattermost, Inc.
28 MB
Requires iOS 9.0 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Copyright 2017 Mattermost, Inc. All Rights Reserved


  • Family Sharing

    With Family Sharing set up, up to six family members can use this app.

More By This Developer

You May Also Like