> what is the moat? Is it brand, speed of innovation, marketing, or something else?

You could try and develop a brand and market it but I don’t think that would go well for something like this. Best case maybe you can game the rankings to stay number one but you’re probably up against professional app copiers.

So your moat is speed of innovation. Your basic app is copied. What new feature will enable you to stay ahead and drive sales? Or perhaps no feature can do that as the crowd grows so it’s on to the next app that doesn’t yet exist. What’s your new pain point?