Slack brings team communication and collaboration into one place so you can get more work done, whether you belong to a large enterprise or a small business. Check off your to-do list and move your projects forward by bringing the right people, conversations, tools, and information you need together. Slack is available on any device, so you can find and access your team and your work, whether you’re at your desk or on the go.

Use Slack to:
• Communicate with your team and organize your conversations by topics, projects, or anything else that matters to your work
• Message or call any person or group within your team
• Share and edit documents and collaborate with the right people all in Slack
• Integrate into your workflow, the tools and services you already use including Google Drive, Salesforce, Dropbox, Asana, Twitter, Zendesk, and more
• Easily search a central knowledge base that automatically indexes and archives your team’s past conversations and files
• Customize your notifications so you stay focused on what matters

Scientifically proven (or at least rumored) to make your working life simpler, more pleasant, and more productive. We hope you’ll give Slack a try.

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What's New

Version 3.55

• Fixed: If you received a notification then went to read the channel the notification was from, the Slack icon in top-left of the app would sometimes stay red-dotted until you closed and reopened the app. Even though you had read the message. Even when you were in the channel, reading the message and replying to it. Not always. Not 100% of the time. Just often enough that it confused the heck out of everyone. Sorry about that. It's fixed now.

Ratings and Reviews

4.1 out of 5
34 Ratings
34 Ratings

Editors' Notes

Keep every team project under control, no matter its size.


So good on web and so bad on mobile.

Really sad that iPhone Slack version missing so many features that exist on Web.
No show only unread or starred.
Notifications are not cleared when messages were read on desktop for example like on WhatsApp or telegram.
Please invest in these important and useful features.


Great idea , make order, saves time and emails

Really brilliant for tasks and projects managers


Slack Technologies, Inc.
146.8 MB
Requires iOS 10.0 or later. Compatible with iPhone, iPad and iPod touch.
English, French, German, Japanese, Spanish
Age Rating
Rated 4+
© 2017 Slack Technologies


  • Family Sharing

    Up to six family members will be able to use this app with Family Sharing enabled.

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