Clearly the total number of applications on the App Store fell for the first time in 2017

Graphing the number of applications on the App Store and Google Play in order to investigate how "the environment surrounding application development will change in the future" was shown in 2017 as the first time in the App Store It turned out that the total number of applications being done decreased.

iOS Developers Ship 29% Fewer Apps In 2017, The First Ever Decline - And More Trends To Watch | App store Insights from Appfigures
https://blog.appfigures.com/ios-developers-ship-less-apps-for-first-time/

App Store shrank for first time in 2017 thanks to crackdowns on spam, clones and more | TechCrunch
https://techcrunch.com/2018/04/04/app-store-shrank-for-first-time-in-2017-thanks-to-crackdowns-on-spam-clones-and-more/

Cumulative App Store titles declined for first time in 2017, report says
https://appleinsider.com/articles/18/04/04/cumulative-app-store-titles-declined-for-first-time-in-2017-report-says

This report is a platform for application developersAppfigures"Written by developer Ariel at. A chart showing how the number of app stores on Google Apps has changed since 2014 is like this. Although the number of applications has increased in both cases from 2014 to 2016, Google Play has increased the number of applications by 30% from 2016 to 2017, while that of App store is decreasing I understand. By number, iOS applications that had 2.2 million titles at the end of 2016 and early 2017 had 2.1 million titles at the end of 2017.


Although the cause of the decrease in the number of applications is not certain, Ariel says that old applications that do not support the 64-bit architecture can not be used, and Apple's judgment guidelines are strict. Apple began removing deleted apps from the App store at the end of 2016, for reasons of "delivering high-quality apps to consumers." In addition, due to the rigorous review, in 2017 the number of new applications released on the App Store fell for the first time in 2008 and beyond. On the other hand, Android developers released 17% more applications than last year.


In addition, there were 17,500 iOS apps compatible with Android applications in 2017, while only 7,500 Android applications compatible with iOS apps were.


As of April 2018, there are about 450,000 applications available for both Android and iOS.