Depending on which fediverse platform you're on, you may have been looking for a good app. Whereas there are many mastodon-apps, there are only limited options for, eg, #misskey, #sharkey, #bonfire and #peertube. In this case, you may very well be delighted to see what happens when you create a webapp: on iPhone: go to your fediplatform in your browser, click share icon, and choose "Add to homescreen". On android, go yo your platform in your browser and click the topright options menu and "install app". Tadaaa, you now have an app version of the web-version.