If you’re thinking, “Why yes, I do know that in iOS a double-tap on the Space bar after typing a word inserts a period and then a space,” award yourself a virtual gold star. If you weren’t aware of that super useful trick, well, you are now. Getting to the Period key on a small-screen iPhone or iPod touch keyboard requires switching to the number keyboard and back again, so this shortcut can provide proper punctuation promptly.
Source: TCN
