Did you have a vesting agreement? Sounds like not. Always prepare the divorce papers before you get married (when you are founding a company). It's awkward and hard, but that's the best time to do it, because if you agree you're all done and if you can't agree, you shouldn't be running a business together.

I think you should absolutely be paid for your time and effort, preferably in equity. Given the structure of your corporation (and how the app was paid for), you may have few options.

Contact a lawyer.