Older servers will not be able to connect.


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.


Host your own server:

Terms of Service:

Contribute to the project:

What's New

Version 1.13.0

Supports Mattermost server v4.10+.
- View who reacted on posts by holding down on any emoji
- Added support for hashtags
- Various bug fixes

Ratings and Reviews

2.8 out of 5
29 Ratings
29 Ratings

Severe usability issues on iPhone X


I don’t usually write reviews for apps, but the Mattermost for iOS app has crossed a line and I need to speak up (slowness, poor native integration and frequent dropped messages notwithstanding).

On the iPhone X, the app renders the top navigation bar and message composition bar inside non-safe touch areas. This means that any touches within these areas, including most of the menu and search buttons, the attachment button and message composition button, are mostly ignored, which constitutes a large amount of the areas that I actually need to use in the app.

Please, PLEASE test the app more carefully in the iPhone X simulator next time before releasing what is essentially broken functionality to purchasers of a brand-new premium smartphone.

Developer Response

Hi MrFitchUS - can you try updating to the latest version? It should support iPhone X.

Not as bad as classic, but still unresponsive :(


Classic was a nightmare. This is a huge improvement. But still it hangs, it’s slow, I have to click and click and click the same send button 10 times before it sends. I don’t care if it’s server or UI issue. It just sits there while people are waiting for me to respond. Switching channels? Haha forget about it.
Look at WhatsApp for inspiration. Use erlang on the servers side. There is a decision maker killing ur company now making bad “here’s how it should be done” decisions when they should be making “here’s what we need to do” decisions. Fix it or ur competitors will fix it for you.

Developer Response

Hi ahmadster - thank you for the feedback! We've heard the comments from you and others, and have been working hard on performance improvements. Some are included in v1.4 (channel switching should be faster), and performance will continue to be our top priority going forward.

As iPhone apps, this is a nice improvement!

Ticked Repeat Buyer

Nice and efficient compared to the Classic app.

What's the timeline on unlocking iPad clients? Using Mattermost Classic on an iPad makes the improvements painfully noticeable.

Last: pro tip: every few days reset your cache under advanced settings. The app becomes very sluggish over time and resetting the cache returns the app back to normal snappiness. This is unfortunate but a useful workaround.

Developer Response

It's planned but no official timeline yet - you can upvote here to help prioritize:


Mattermost, Inc.
65.2 MB
Requires iOS 9.3 or later. Compatible with iPhone, iPad, and iPod touch.
Age Rating
Rated 4+
© Copyright 2017 Mattermost, Inc. All Rights Reserved


  • Family Sharing

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