I have been thinking about forking one of them, to finally make one that isn't shit.
My biggest issue with them all, is horrendously inefficient screen space usage. Not a single one of them achieves the same message density on-screen as most commercial messaging apps. They use pointlessly massive margins and line gaps, and often the font is SMALLER while fitting fewer messages on screen!
Images are either massive, or pointlessly refuse to take up horizontal real-estate. On some, reactions are unusably tiny for seemingly no reason.
I have been using schildi, it has enough customization over element, that it's been good enough for me. But I still do want something closer to the message density of Telegram, while allowing a larger font for readability.
All the color options are also way too bright. I'd love to use an accent but they contrast horribly with the white text that is then overlayed atop them. This is a problem in multiple clients...