For an app to turn into a sustainable and real business many factors come into play. I'm still pondering upon them myself. As a founder what did you do differe

For an app to turn into a sustainable and real business many factors come into play. I'm still pondering upon them myself. As a founder what did you do differently this time with your new app that increases your odds of making it a success? Did you validate your idea before building or it was just your assumption that people would buy it? How painful or valuable the problem is that you are solving with your app? Is there a demand for your app or are you trying to create a demand too? Are you solving around just a convinience or a painful problem for people to care enough? About app distribution, are you just hoping and leaving it to luck or you have a plan (even on a budget) to get some eye balls on the app? Many questions to pause and reflect about.