Question: I have an app on Apple Store and I would want to know the breakdown of devices running iOS 7, iOS 7.1, iOS 8, etc. However, this information doesn't seem to exist on iTunes Connect which is just showing breakdown of devices like iPhone, iPad.

My question is can we find the breakdown of the devices based on iOS version for an app on Apple Store? This will help me decide which iOS versions the new release should be targeted.

Thanks.

Answer: 
Now you can check application usage by iOS version at
<https://analytics.itunes.apple.com>.  

The URL is memorizable enough. Mnemonics!

Let me attach a screenshot from a different post as an example:

[iTunesConnect - Download automatically app's usage analytics](https://stackoverflow.com/questions/31620111/itunesconnect-download-automatically-apps-usage-analytics)
[![sample](https://i.stack.imgur.com/z7IkP.png)](https://i.stack.imgur.com/z7IkP.png)

For more screenshots, please check this post:

[Missing iOS 7 App Usage data in iTunes App Analytics?](https://stackoverflow.com/questions/35881793/missing-ios-7-app-usage-data-in-itunes-app-analytics)
You can create a very simple web service for getting the Statistics of iOS versions

You will get the current version from the below Objective C code

```
UIDevice *dev = [UIDevice currentDevice];
NSString *deviceSystemVersion = dev.systemVersion;

```