Apple's App Store is filled with more than 350,000 applications. According to AndroLib, the Android Market has about 280,000 apps. Apple in January announced that App Store Downloads topped 10 billion. Again, according to AndroLib, the Android Market sits at 3.7 billion and climbing. If looking just at these numbers, then clearly the advantage belongs to Apple. But if you're a software developer, there's one very compelling reason you should consider Android over iOS.