iOS 9.3 is coming in the Spring and will introduce Night Shift as well as a number of other new features.
Apple Announces a 16GB iPhone and 32GB iPod touch
"For some users, there's never enough memory," said Greg Joswiak, Apple's vice president of Worldwide iPod and iPhone Product Marketing. "Now people can enjoy even more of their music, photos and videos on the most revolutionary mobile phone and best Wi-Fi mobile device in the world."
The new iPhone and iPod touch models are available immediately.