Mobile application markets have grown significantly due to increased use of mobile devices and advances in mobile technology. As mobile commerce expands, the size of the app market is expected to grow exponentially. There are now thousands of apps available across various app stores and mobile platforms, with total industry revenues estimated to reach $27 billion by 2013. While Apple currently dominates the market, analysts predict its share will decrease to 15% by 2015 as third-party app stores capture a larger portion of sales.