I think it is important to honestly look at it. Not with what if, but how likely something is to happen. How likely is it that it can be sold as is in a month? How likely is it is that it is going to be profitable? How likely is it that more development work needs to be done? My gut tells that the answer to the first two questions is pretty low, as if there was a really good chance of making a profit or selling, you wouldn't be wanting to leave. Instead you'd be looking forward to the incoming money.
Do you have any sort of a written agreement, or was it a handshake deal.
The funny thing is that the only way it would make sense for Jim to sell the company in a month is when I leave. Otherwise it doesn't in such time frame.
Yeah, we have a company together that operates the app, but as I've mentioned before it's unclear whether Jim couldn't simply establish a new company and operate the app under it (since the app development itself was paid for by Jim + has a contract about it stating that he's the one requesting the development)