Fuck! If you don't know what your own tech is capable of then, yes, you're doing it wrong. And, being concise != smug.
The iPhone keyboard "pops up" the letter you are currently pressing so you can see it above your finger or thumb. You can move your finger around to different letters and the keypress won't register until you lift your finger.
Settings > General > Keyboard > Auto-Correction
Been there since v. 2.2
"Kill the Wabbit, Kill the Wabbit, Kill the Wabbit!" -- Looney Tunes, "What's Opera Doc?" (1957, Chuck Jones)