This is probably was already going to be a big financial change for the developer, and now he’s taking the risk of spending untold hours porting an app from one platform to a totally different one with no guarantee of seeing the value he put into it come back to him. I want to see this succeed, and I think this is what Patreon is for so I wanted to suggest that we help him out there.
Here is a link to his account so you don’t have to search for it. Patreon