Even though your iPhone's Camera app is fast and easy to use, its default settings prevent you from immediately accessing any other shooting mode aside from "Photo" with "Live Photo" on and no filter applied. But there is a way to make the Camera app remember what you prefer the next time you open it up.
The default Camera app on your iPhone can take some pretty incredible photos during the day. Newer iPhone models can even make nighttime shots look good. But you can't just point and shoot if you want to capture some pretty spectacular fireworks photos on July 4th, New Year's Eve, or another pyrotechnic celebration.
There are a ton of new features in iOS 11, but some of the best ones, in my opinion, are in the Camera app. They're not huge features, but they're much appreciated to anyone who's ever taken a Live Photo or portrait, or even to those who've needed to scan a QR code quickly.