I just noticed today that i no longer have "Simple Gallery Pro" on my phone. It vanished from f-droid, too: https://f-droid.org/packages/com.simplemobiletools.gallery.pro/

I know Simple Mobile tools have been sold to ZipoApps and their future is unclear, but I did not expect the apps to just disappear on f-droid and my phone!

Do you know of any forks yet?

What would be the closest alternative for the gallery?

Can I expect all my "Simple Mobile Tools" apps to just disappear?

Edit: It seems it F-Droid just automatically upgraded to "Fossify Gallery". It just did not replace the icon shortcut in my launcher. So no vanishing, just a silent replacement. I can live with that :). Thanks for all of your helpful replies.