A.I.K.A - GoToSocial

Astral Intelligence Keepers Alliance

GoToSocial does not provide its own webclient, but implements the Mastodon client API. You can use this server through a variety of other clients:

Elk

A nimble Mastodon web client.

Tusky is a lightweight mobile client for Android.

Feditext (beta) is a beautiful client for iOS, iPadOS and macOS.

Or try one of the clients listed on the official Mastodon page.