Here are a few reasons why you should upgrade it sooner.
1. Multiple on-screen applications
Multitasking and iOS have always gone hand in hand. However, what all the users cannot do is run two apps at the same time on the screen. Well, if you upgrade to iOS 9, you will be able to run two applications at a time. On iPad Pro or iPad Air, you use apps in Split View, that is, run different full applications in a landscape mode. For example, running a word document next to the web browser will be easier. Thus, it will make it easier for the users to use their desired applications at a time.
2. Proactive Siri
Siri has been made smarter and apart from all the existing features, in iOS 9 Siri will suggest people you might love to contact or use certain apps based on your previous usage. It will also help you in getting news and suggest various things that are related to it. It is not as delightful as offered by Google but improved and proactive siri is a massive step in the right direction.
3. Smaller Apps
For those who are struggling with 16 GB device, put back your worries. There is app thinning done and you may be able to accommodate a lot of applications on your device. You will only get those apps that will be supported by the device and this will help you in getting things that your device needs. This will also save a huge amount of space on your device specifically when you have
game apps with heavy graphics.
4. Extra power
With every update, the users have an issue about the reduction in battery life. However, with iOS 9 Apple has introduced exceptional options for saving power and battery life. There is a new power saving mode being introduced that will support your phone even if it has very less power. For example, you will only see the notification when you wake the screen manually.
5. Additional features in Apple Maps
Apple Maps has something for all those who spend more time travelling via bus rather than a car. The maps are no longer restricted to driving or walking.