With iOS 10, apps and stickers were introduced, but iOS 11 makes them even more accessible with an app drawer at the bottom of your Messages screen.
Also new with iMessages, when you sign into a new device, all your messages are automatically synced (so you can delete embarrassing messages across all platforms!).
There's also optimized device storage, and end-to-end encryption.
Apple Pay now introduces person-to-person payment!
Send and receive money while chatting with friends and family because it's integrated right into Messages as an iMessage feature. The money you get will go into your Apple Pay cash card, so you can shop online, send money elsewhere, and more! It'll be available with all iOS devices.
Siri is available in more languages and more countries than any other assistant, but it's time for a change! Siri's voice has changed to a more natural, less robotic tone for both the female and male voices.
Siri also has a new translation option: If you say, "What are the most popular dishes in your restaurant in ______?" Siri will translate and speak in that language. Right now, the translation languages are limited to English to Chinese, French, German, Italian, and Spanish, with more languages to come in the next few months.
SiriKit can now do more than ever: secure task management, take notes in Evernote, do banking with Citymobile, chat with WeChat, and so much more!
With iOS 11, Apple is introducing HEVC — a format that's up to 2 times better, compression-wise, for camera-captured videos so you use up less space on your device.
To save even more space, iOS 11 is also introducing the replacement to the JPEG called HEIF, which is half the size with twice the quality.
Low-light photographs will have improved image quality, improved low-light performance, optical image stabilization, true tone flash, Depth API, and HDR.
If you loved the Memories feature that came with iOS 10, then you'll love being able to watch your Memories in portrait mode with iOS 11!
Live photos can now be trimmed, selected, muted, looped, rewound, and so much more. You can also go into Live photos and select the frame you want to display as the first image you see when you tap/look at it!
Oh, and did we mention you can select and alter exposure, i.e. change the long exposure on a photo.
There are new maps for exploring and shopping at major malls and maps for major airports, like Amsterdam, Baltimore, Chicago, Denver, Dubai, Hong Kong, Las Vegas, Nashville, New York, Toronto, Vancouver, and so many others!
There's also going to be new navigation tools, like lane guidance for when you're trying to navigate your way through traffic.