16. Finally…The One Finger Keyboard
Apple finally built a one-finger (a thumb, really) keyboard option into the built-in QuickType keyboard. When you want to access it, hold down the emoji icon, which is typically used to switch between all the installed keyboards. You’ll notice two little mini-keyboard icons on left or right—pick the one closest to your typin’ thumb. If you want the one-thumb keyboard permanently, go to Settings > General > Keyboards > One Handed Keyboard and mark the one you want.