You don't need an app. Use it in the browser. But you need a functioning team/community using it to see how it works. Mobile is different. From what I hear th

You don't need an app. Use it in the browser. But you need a functioning team/community using it to see how it works. Mobile is different. From what I hear the Slack client is better/easier to use than the Zulip client. Haven't used either of them myself.