One week after releasing iOS 10.1 to the public, Apple has now released a minor update that addresses some issues. Mainly, we see a fix where health data may not have been able to be seen by some users. That is the man fix in this update. We won’t see anything major until another .x update.
To get iOS 10.1.1, you can go to the Settings app > General > Software update > iOS 10.1.1. It’s available over the air as well as through iTunes. This is a very small update and won’t take long to download or install.