Millions of apps have been uploaded to Apple App Store since the birth of it. Out of the huge number of apps, some hundreds of thousands apps have been removed from the store, leaving the total number of available apps to roughly 2.2 million (end of 2017). Apple has also taking active efforts to improve the quality of the cleaning the store from clone and spam applications. It is still estimated that the number of apps will grow by another hundreds of thousands of new apps ov