Let's face it, the iPhone 6 and iPhone 6 Plus are pretty big devices and it takes some getting used to typing with one hand. Although reachability helps in some cases, it is not the case for typing on the keyboard and reaching over to letters on the opposite side.
HandyKey is an extremely useful Jailbreak tweak, especially for iPhone 6 Plus owners. The tweak adds the keyboard from the iPhone 5/5S system-wide, replacing the iPhone 6 keyboard. HandyKey allows for left-handed and right-handed users, and leaves a gap on the opposite side. Aesthetically, it looks off, but you have no idea how much easier it is to type one-handed with a minimized keyboard.
Using a two finger swipe in each direction on the keyboard, the user can change the orientation of the iPhone 5/5S keyboard, and even go back to the iPhone 6 keyboard when using two hands. HandyKey isn't a free tweak, but it will only run you $0.99 and it's well worth it in the Cydia Store.
