Apple's iOS 8.4 has been adopted by 41 percent of all iOS devices just one week after its debut. What's causing so many iOS users to upgrade to 8.4 so quickly? As major addition, Apple Music may be the top reason accounts for the surging adoption. But there are more new features that attract users. Let’s see what your iPhone or iPad can do now with iOS 8.4 to find out why there is such a huge jump in iOS 8.4 adoption since its debut on Tuesday, June 30.
General Tips & Tricks
Find battery guzzling apps:
Apple doesn't specifically tell you which apps are using the most memory, but it does allow you to check which apps have used the most battery over the last 24 hours or 6 days. Go to Settings > General > Usage > Battery Usage. Here you'll be able to see if a certain app has been used more than others. That might help change how you use that app.
Standard or Zoomed:
On the iPhone 6 and iPhone you can change the display setting from Standard or Zoomed. To switch between the two if you've changed your mind after setup go to Settings > Display > Display Zoom and select Standard or Zoomed.
Disable Favourites and contacts showing in App Switcher:
Go to Settings > Mail, Contacts, Calendar scroll down and toggle "Show in App Switcher". When you go back to the App Switcher mode they will have gone.
Creating nested folders:
It's a glitch, but it does work if you are timely. Create a Nested folder by dragging one app icon on to another one. Then quickly drag that folder into an existing folder. If you are not timely enough, keep trying and you should achieve a nested folder.
Safari Related Tips
If you want to set DuckDuckGo as your default search engine over Google, Yahoo, or Bing, go to Settings > Safari > Search Engine and select the private friendly search engine as the default.
Making websites load faster or saving your data
Safari in iOS 8 preloads the first hit of the search result to make loading your choice seem quicker. The downside is that this could use up data. If you want to turn it off go to Settings > Safari > Preload Top Hit and turn it off.
Searching on page:
If you are looking for a specific word on a page, simply start typing that word into the URL bar at the top of the page. The results will show you the google search results first but if you scroll down it will show you "On This Page" and let you jump through the mentions of that page.
Swipe forwards and backwards:
Swiping from off the screen on to the screen from the left of the screen goes back through your browsing history while swiping from the right of Safari goes forward through your browsing history.
Quick Voice message:
If you press on the new mic button on the right of the text box you can start recording a verbal message. Lift your finger to stop to reveal a playback button. Once happy either swipe up or tap the arrow to send it or swipe left or tap the x button to cancel.
To see more information about the sender press the word Details at the top right of the screen. It will allow you to send your current location or your constant location.
Automatically deleting audio or video messages:
Apple by default sets it so once you've sent an audio message it will delete from your iPhone or iPad after two minutes. If you want to keep the message go to Settings > Messages and scroll down to Audio Messages or Video Messages sections and toggle the Expire setting.
Raise to listen to audio messages:
It's on by default but you can turn off the ability to listen and reply to incoming audio messages by raising your phone. To turn it off go to Settings > Messages and toggle Raise to Listen.
Send iMessage as SMS:
If you are having trouble sending your iMessages (over data) you can opt to have iOS 8 revert to sending the message as a SMS instead. Go to Settings > Messages and tick the relevant box.
Source: iOS 8.4 tips and tricks: See what your iPhone and iPad can do now