Presence of the Snapchat or Facebook Messenger in the top rating is not a surprise: both messaging services are popular and viral by nature. As native advertising are considered by users to be as less irritating and intrusive, they get more popular revenue stream for app providers. Google and Apple provide an ability to handle the subscription transactions through their platforms, making easier for developers to implement it. The technology involved in creating a mobile app might be overwhelming. Downside : Ad revenues can be pretty low for apps with a small audience. The total projected revenue in is more than double the global revenue from