@Profpatsch@mastodon.xyz

There exist a lot of apps, that make use of the #Mastodon Client #API.

There may exist some using #ActivityPub C2S... and some using some other kind of API.

If you want to use one app with accounts on several server (or instance) types, the app (client) and the servers need to support the same type of API.

As one of them is flohmarkt and Grindhold is a friend of you, maybe just ask him regarding the API possibilities. Then you could see, if there is already an app existing, that supports all your wanted server types.