Lots to think about.

First, evaluate the project from a business standpoint. Ensure that people will pay for your solution once they know it exists. And estimate what it will cost you to market the app ... so that people who might pay actually get the chance to do so!

Second, evaluate the app from a technical standpoint. What will it take to build it?

Third, before you launch, think about branding. I can help you with your identity, your pitch, and especially your name.