@amrowsell I use the F-Droid store, and find the Fedilab application useful. It supports Pixelfed accounts as well as mastodon the other one I downloaded but haven't tried yet is called AndStatus.
@mnw For SIP I am just using the built-in Android SIP client, so it integrates with the normal dialer.
"I appreciate SDF but it's a general-purpose server and the name doesn't make it obvious that it's about art." - Eugen Rochko