He hasn't presented the offer to me yet. Just wanted to know if I was interested in joining them. The offer might be that I would get stocks immediately but no salary until after so many months. He hasn't accepted any investments yet to build the software and add value before sharing ownership.

But I'm on you people's side that I don't want to work for free. Just wanted to hear pros and cons on joining a startup and defer a potential reward. I've long wanted to do something of my own that I feel passionate about instead and get investors aboard early enough that I can get salary.