. 1 Save Your Battery (iPhone Only)
iOS 9 brings a power-saving mode that shuts down many background processes and can even take a few minutes out of your iPhone's battery when needed. You will be given the option to turn on the device when the battery level reaches 20 percent. However, you can activate it at any time by looking under "Settings" in the "Battery" section. Of course you still can not bear to turn off the phone completely to make sure the battery lasts longer …
2. Teach Siri Your Voice
With Apple's new software update comes a Siri language training feature so that the digital assistant app can better recognize the sound of your voice (and perhaps your strong regional accent). To get started, open the General page in the App Settings, tap on Siri and allow "Hey Siri": after you've practiced a few sentences, you can say "hey siri" to activate the app if you have Phone is plugged in and charging. On the latest iPhone 6s and iPhone 6s Plus, voice linking works regardless of whether the phone is charging or not.
. 3 Browse Settings
If you're lost in the rather lab-like screens of the iOS Settings app, you'll be pleased that you can now easily browse them. The search box appears at the top of the Settings homepage. Just type in something that pertains to the option you want, and iOS will do the rest. If nothing appears below your query, there's a chance that such a setting is not available on your iDevice.
. 4 Turn Off Slow Wi-Fi Networks (iPhone Only)
At the bottom of the Mobile Data menu in Settings, a new option called Wi-Fi Assist is hidden in iOS 9. What it does is that your iPhone automatically falls back to a strong 3G / 4G signal when WLAN proves to be problematic (too slow, too unstable, or not connected at all). It's designed to save you the trouble of manually turning off Wi-Fi when you know a data connection is faster and less tedious (just make sure you have the data plan).
. 5 Find Your Friends Quickly
Apple's app Find friends – which lets you find iCloud contacts on a map with their permission – has been around for some time, but now it's an app in iOS 9 (like mail or maps), which means everyone has it installed. It also includes a new Notification Center widget that you can activate by dragging down from the top of the device and tapping the Edit button. Check the Find friends option, and then tap Add friends to decide who you want to show on your Today page.
. 6 Changing video recording resolution
The iPhone 6s and iPhone 6s Plus are bringing 4K video recordings to an Apple handset for the first time, a resolution that can consume a significant amount of your phone's internal memory. To help prevent potential issues, iOS 9 includes a video-resolution selector that you can use on any device (not just the new iPhone): go to Settings, then Photos & Camera, and then Video capture to set your preferences. On devices that support slow motion video, you can also set video resolution.
. 7 Create a longer security code
The longer the security code, the harder it is to crack, and iOS 9 sets the new standard length to six instead of four. If you already have a four-digit PIN, go to Settings under Passcode and tap Passcode. You will then be asked to enter a new six-digit code. Although Touch ID replaces the passcode in many situations, there are still times when iOS relies on it (for example, when the device is restarted).
. 8 Set Context-Sensitive Reminders
Siri has a few more tricks in iOS 9, and one of them is the ability to set a reminder based on what you see on screen: a map location, for example , an e-mail or a website (assuming the app supports the required Siri integration). Start Siri by pressing and holding the Home button, just say "remember" to set up a reminder. Ask Siri to "show memories" to see all the memory joggers currently stored in his memory.
. 9 Jump directly to your selfies
iOS 9 introduces two new photo folders that let you automatically filter some of your snapshots. First, there are screenshots that will help technology journalists around the world, and then there are still selfies – that does not magically recognize your face, but simply grabs every image with the front camera. If you'd like to quickly get a recent selfie, go to the photo app, then tap the Albums button on the toolbar to see the selfies entry. You can still sort these images into each of your own albums.
10th Adding Photos and Cards to Notes
Currently, all of Apple's apps are being updated with iOS at the same time (something that Google has moved away from). This means there's a lot to talk about in terms of individual apps: Notes gets the biggest upgrade, and you can now add photos, maps, doodles, checklists and web links to your entries. It's now much better equipped to accept Evernote as a more general note app – give Notes another try if you were unimpressed by it before.
. 11 Block Advertising on the Web (Safari)
Somewhat controversially, Safari's iOS 9 edition provides content blocking support for apps that skip advertising from the Internet while browsing. You must first install your selection of apps – Crystal, Blockr, and BlockBear are three of the best known – and you can then go to the safari section of the settings to enable them. Some of these ad blockers stick to the basics, while others (usually those you have to pay for) give you more control over what kinds of content are not visible.
12th Changing the Appearance of Reader View (Safari)
If you follow the updated version of Safari in iOS 9, you can now customize the look of the Reader View mode (which also hides ads) unnecessary content that does not belong to the main article on the page). First, tap the Reader View icon (to the left of the address bar) to remove any unnecessary data. You can then tap the double AA icon on the right side of the address bar to change the font size, font style, and color to best fit your eyes.
. 13 Annotating Email Attachments (Mail)
Another Apple app to receive a handful of minor updates is Mail. It is now possible to sketch an entire e-mail attachment before sending it back to the original sender (perhaps with some suggestions for improvement): tap and hold an attachment (such as an image or a PDF) in an e-mail You pressed the marker Answer option The screen below gives you access to a variety of pen and text tools and options to customize the colors and styles of your squiggles.
fourteenth Attach Attachments to Emails (Mail)
In the dark days of iOS 8 and earlier versions, you could only attach photos or videos to an outbound email created on your Apple device. With iOS 9, any type of file is allowed as an attachment. Double-tap the e-mail text as usual, and then choose Add Attachment from the pop-up list. Your iCloud Drive folder opens by default. However, you can select locations to set up other supported sources, such as Dropbox and Google Drive.
15th Choose Multiple Photos Easier (Photos)
This is just a small change, but it can make a noticeable difference if you spend a lot of time with photos on your iPhone, iPad or iPod touch. If you're in the Photos app, you can tap "Select" as usual to select multiple images, not just one. The difference with iOS 9 is that you do not tap every single picture, but just tap and slide pictures close to each other. It should make it easier to upload or delete a photo strip.
sixteenth Hide Photos from the View (Photos)
There may be photos on your device that you do not want to see every time you scroll through your gallery – maybe they did not come out so well or find them Not the rest of your daily snapshots – so Apple added a new Hide option, which you can find via the Share menu. The selected images disappear from the Moments, Collections, and Years screens. Note, however, that they continue to appear in the folders on the album page (and you can show them again from here).
17th Public Transportation (Maps)
Apple Maps can finally tell you how to get from A to B by public transport – as long as you live in London (or in Baltimore, Chicago, New York), Philadelphia, San Francisco, Washington DC, Toronto, Berlin, Mexico – city and several cities in China). Just select the transport option when you ask Apple Maps to work out a route, and a list of options will appear on the screen. Tap the small information icon for more detailed instructions. Hopefully the support for more locations is on the way.
18th Putting apps in a sidebar (iPad only)
iOS 9 has some exclusive tricks for the iPad: specifically the iPad Air 1 and 2, the iPad mini 2, 3 and 4, and the iPad Pro. With one app on the screen, slide one finger from the right side of the display and you can see another app in a pinned sidebar – Apple will show you all installed apps that are compatible with this new Slide Over mode. Tap one to display it, and then tap the main application to hide the sidebar. To change the sidebar app, drag down from the top of the screen
19. Activate split-view mode (iPad only)
Slide Over only offers a limited preview of a second app for short reference purposes, but if you have an iPad Air 2, an iPad mini 4 or If you have an iPad Using Pro, you can use a true multitasking mode called "Split View": Drag the boundary line in the middle of the screen while the "Slide Over" window is displayed, and you have two apps side by side. If you'd like to change the primary app you started with, just tap the Start button and choose a new app on the Home screen.
20th Playing video clips over other apps (iPad only)
Here's another trick for the newer group of iPads we mentioned earlier (any iPad Air, any iPad mini except the original and the iPad Pro): picture-in-picture video. It depends on your favorite video app that supports the feature. If this is the case, a small double rectangle icon will be displayed in the lower right corner of the video window. Tap on it and then on the home button select another app The video window stays up and you can move and resize it as needed.
21st Turn the Keyboard into a Trackpad (iPad Only)
Apple is struggling hard to turn the iPad into a productivity device, and our last iPad feature turns the keyboard into a trackpad designed for the iPad Text selection is useful and move the text cursor around the screen with greater accuracy. All you have to do is press and hold with two fingers on the keyboard – the keys themselves turn gray and you can then move your fingers to control the cursor. Lift your digits off the iPad screen and the keyboard will return.