Server v5.25+ is required. Support for server Extended Support Release (ESR) 5.19 has ended and upgrading to server ESR v5.25 or later is required. As we innovate and offer newer versions of our mobile apps, we maintain backwards compatibility only with supported server versions. Users who upgrade to the newest mobile apps while being connected to an unsupported server version can be exposed to compatibility issues, which can cause crashes or severe bugs that break core functionality of the app.


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.


Contribute to the project:

What’s New

Version v1.37.0

Server Versions Supported: Server v5.25+ is required, Self-Signed SSL Certificates are not supported unless the user installs the CA certificate on their device.

- Icons have been updated across the app to be more consistent and adhere to new design standards.
- The user autocomplete now allows matching on terms with spaces (For example: @firstname lastName) the same way as in the WebApp.
- Added various bug fixes.

Ratings and Reviews

2.6 out of 5
147 Ratings

147 Ratings

ntwrkguru ,

Bugs, lagging feature parity, and poor support

Unfortunately, I’m forced to use this service for my job but it’s definitely not Slack. First, there are a lot of bugs with the server, the Mac client, and the iOS app. Specifically to the iOS app, there are “stuck” notifications on the app icon. Secondly, support is pretty much non-existent unless you want to go through a hassle of opening a GiuHub issue and hoping someone looks at it. Open-source should not equal poor support. Lastly, the feature parity is just not there.

This app works, apart from the notification bug, so I’ll give it 3 stars. But the overall service and apps combined is pretty awful. I can’t believe people would pay for an “Enterprise” license given its issues.

[update] Took a YEAR for the developers to respond to this, and then it’s a “try our new version”. In that time, we moved to Slack and now to Teams. Sorry, but that’s just too slow. I mean, it does work, but I would never choose it for wide scale Enterprise use.

Developer Response ,

Hi there, appreciate your feedback. Can you attempt to upgrade to our latest release and try again? Our support team is really helpful and always available at if your issues persist

Anon.111 ,

Buggy as can be.

Look, I decided to implement this instead of Slack for my company because I can host on prem and have total control over the functionality. It also ties in nicely with Jira and other well known webhooks: Cloudwatch, Jira etc. But my god, is this the buggiest software/app. Notifications sometimes send (we’re on the enterprise version) - the notification server works when it wants to. If you’re on your phone while a Mattermost notification comes through, you won’t see the pop up. If you’re lucky you’ll see a badge number, but that’s rare. If you do get a badge number, it won’t go away until you log out which is a pain especially if you’re using 2FA. It’s odd, because Mattermost is supposed to be Enterprise level, and their interface is so nice and nice to use, but for whatever reason they can’t seem to iron out all their bugs. How hard is it to fix a badge icon? Or actually push notifications? What’s funny is that on this latest release it says badge icon issue fixed - I updated - and the issue is still there. Ughh. What can you do? Fix your bugs Mattermost!

Developer Response ,

Hi there, can you attempt to upgrade to our latest release and try again? We've addressed some issues around badges and notifications. Please contact our support team if your issue persists at

Marliejo Vitale ,

“Various bug introductions”

Twice now there have been releases that included “various bug fixes” and other features. However, they’ve also broken and introduced a bug (the same issue, to be clear) in a release. The app has had various spontaneous logout issues, text overlay problems to name a few. We do like the open source aspect and have definitely taken advantage of all our abilities to integrate and customize for our specific environment, but MORE TESTING before releases of the mobile client needs to take place.

Developer Response ,

Hi there, appreciate the feedback. How is your experience after upgrading to our latest version? We'd appreciate any bug reports or issues at where our support team can help.


Mattermost, Inc.
32.3 MB

Requires iOS 11.0 or later. Compatible with iPhone, iPad, and iPod touch.



Age Rating


  • Family Sharing

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

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