I am going to assume you want to know what a fork is. if not, ignore me.
If the sourcecode of a software is publicly available, someone can take that sourcecode and develop it into a different direction than the original software. In this case, a third-partt reddit app called Infinity is being developed into a Lemmy app by someone who is not the original dev.
just an assumption ( also u guys need to be open for some critique, facking hell! ) but also why his pricing is way more than he used to charge for sync for reddit ? said he would work on the app 'full time': what does that even mean ? would he quit his day job for the app ? would such an app require full time maintenance ? also pricing more than he used to do without sparing any thought for the instance admins kinda fishy: i know that lemmy code is beyond his reach but placing ads on feed is like taking instance owners for fools and shidding on them, at least while pricing leave some room for people so they can donate to instances until something serious is done about it..and please grow some brain cells before responding to this:and no, devs dont need to sync up app release.