It is a typical modern convenience. It actually can be helpful for speed's sake once you get the hang of watching the words that he device is anticipating before you hit the “space bar”. I typically leave it on when using a phone and off when using a tablet. But often the errors that are found when you take the time to carefully proofread are amusing, not to mention the ones that make it past scrutiny and actually get posted.
“he” vs “the”... actually typed on a PC... but could easily be blamed on Android.