App appeal is obvious. The barrier to entry? So low! The upshot of producing the next Angry Birds or beer-chug simulator? So high! Heck, with just a small investment of time and cash, it’s not hard for would-be mobile moguls to turn a concept into a steady stream of cash. And thanks to today’s app stores, it’s never been easier to try your hand at becoming the next tech tycoon.Here’s almost everything you need to know before you get started on your own app — and what I wish I knew before I got into the game.