alphadogg writes: The practice of flipping is probably most familiar to the general public from reality TV shows like "Flip This House" on A&E. The idea is to buy a house for a lowish price, fix it up a bit, and then sell it on to a buyer, hopefully at a profit. Now, the secondary market for Android and iOS apps is beginning to see the same pattern. App creators without the time or inclination to service or monetize their apps can simply sell them off for a flat, up-front sum of money. Buyers can then either tweak them as they like or not, and either attempt to monetize them themselves or re-sell the apps to still another party. "Probably 80% of people who want to get involved in mobile either don't know how to code an app or don't know an app developer," says the founder of one app trading site. "So there's this massive demand, but kind of a little bit of a barrier to entry."