Battery life is still a major problem in today's gadgets. Apple hopes to address the issue in iOS 9 with a new low-power mode. When enabled, the feature extends battery life by up to three hours. It will, however, disable some visual effects and reduce performance when turned on.
iOS 9 improves the built-in Notes app on iPhones and iPads. A formatting toolbar lets you easily insert checklists, photos, videos and more into notes. You can also sketch out notes using your finger, and organize them into folders.
Apple Maps finally gives you directions for trains and buses in major cities. For example, you can see the schedules for both New Jersey Transit and Long Island Rail Road after you click on New York Penn Station.
Along with a slight visual overhaul, Siri is smarter than before. The virtual assistant can remind you of things based on the time of day or even your location. For example, you can say "Remind me to take the trash out when I get home." Siri also responds to specific commands, such as "Show me the photo I took yesterday."
A double-tap on the home button brings you to the redesigned app switcher. Instead of a fanned-out view, the menu now shows apps stacked like a deck of cards. Like before, you can still close recent apps with a upward swipe on the screen.
Before iOS9, the default Apple keyboard would always show capitalized letters, even if you were typing in lowercase. Thankfully, this has changed. Now the keys will show as lowercase letters unless you hit the shift key (or double tap for caps lock). In other words, a quick glance at the keyboard will help you see if you're typing in lower- or upper-case.
The Spotlight search features results from the Web, your contacts, apps and nearby locations. Spotlight can now be accessed with either a pull-down on the center of the screen (the same way it was in iOS 8), or by swiping to the far left home screen.