In an update to its iOS app today, Slack eliminated its standalone Apple Watch app. Slack customers will, however, still be able to respond to incoming messages on their Apple Watch thanks to rich notifications.
Apple Watch users, there's now one iOS app for all of your needs. We've removed the standalone Watch App, but rest assured, receiving and replying to messages from your wrist works the same as before. It's like two for the price of one, but with apps.Slack's Apple Watch app, like many of the Apple Watch apps that have been abandoned, was never particularly useful, so it's no surprise Slack has decided not to dedicate additional resources to it. The Slack Apple Watch app let users view unread mentions and view and respond to direct messages, but these features were not easy to use on a wrist-worn device. It also let users receive and interact with notifications, features that are still available through an iPhone.
When the Apple Watch was released, most companies developed an Apple Watch app for the device even if the app didn't do anything useful, because it wasn't yet clear how and when people would use apps on the wrist. As the Apple Watch has matured, though, it's become clear that most dedicated apps offering anything beyond a quick interaction aren't used often enough to be a worthwhile use of company resources.
For example, Twitter in September ended support for the Apple Watch, eliminating the standalone Twitter app on the device. At the time, Twitter said that it felt notifications were the most helpful part of the Apple Watch Twitter experience, which is also what Slack is now relying on.
Other companies that have stopped offering Apple Watch apps include Target, eBay, Whole Foods, Amazon, and Google (for Google Maps). eBay and Google have both said Apple Watch support might return in the future, but have not yet released new apps.