The excellent Mastodon/PeerTube/Pleroma app Mastalab has changed its name to "Fedilab", to reflect that it works on many Fediverse services.

Fedilab is available through Google Play and @fdroidorg

The new site is at:
https://fedilab.app

Their Fediverse account remains the same though, it's still at:
@tom79

(It's also due to get PixelFed support soon.)