Secret. Infinity Blade 3. Flappy Birds. Vine. Mailbox. Amazon Instant Video. Facebook Paper. Tinder. I could go on. Whether it's a hot new messaging app or a game everyone is talking about, the best apps tend to go to iOS first. And some never make their way to Android. There's some very good reasons for this reality. Developers tend to favor iOS because it's easier to develop for a single, non-fragmented platform. They don't need to account for myriad OS versions, screen sizes and resolutions. Most important for devs, iPhone owners pay more than three times per app than Android users (19 cents versus 6 cents, on average).