I would think that as a single developer your first app should be really simple and more on the lines of getting a hang of the SDK, time to get the app done ...

I would think that as a single developer your first app should be really simple and more on the lines of getting a hang of the SDK, time to get the app done ... basically more like a tutorial project that you release to the world. With that knowledge, I would think you'd have a better idea to innovate and monetize in the next apps