iOS 9 is out, and it’s time to update your iPhone or iPad to the latest version of Apple’s mobile operating system. New features include enhanced multitasking for iPad, Proactive Assistant Siri, new Low Power mode, Transit directions in Maps and many more. iOS 9 also comes with a handful of security and privacy improvements. Before loading new apps, customizing your phone, or syncing your data, you need to check these settings and if necessary, changed. You should immediately change these security settings to protect your privacy.
Source: https://thehackernews.com/2015/09/ios9-privacy-security.html