There are a lot of cool features but I love this one. I use this one all of the time. Turn your keyboard into a trackpad on your iPhone 6s and 6s plus with ease. Of course this only works with Apple’s keyboard and not third-party keyboards and you must be on iOS 9. But what did you expect, Apple has to keep the really cool features for themselves.
STEP 1: Open any app that uses a keyboard
STEP 2: Press and hold firmly on the keyboard to activate the trackpad
STEP 3: Slide your finger around to move the cursor
STEP 4: Press harder to select whole words
STEP 5: Release to return to keyboard
Here is a video of it in action.