Those who has already upgraded to the newest Apple iPhone iOS 8 discovered a lot of new features. Things like predicated type and 3rd party keyboards (existed on Android devices since 3-4 years ago), but there are a few less advertised features that are worth knowing too. Including:

Exposure control
Hide Photos
Recently deleted photos
Photos can be pasted on Notes
9 Days of weather forecast
Make iPhone grayscale
Scan credit cards