Most of us have actually felt the constraints of the common grammar- or spell-check at some time (the grammarly). And who hasn't looked in confusion at one of Word's relatively random squiggly lines and wept: 'What do you desire from me?' Up until now, no program has received much higher praise than 'much better than absolutely nothing' and definitely absolutely nothing has yet replaced a well-trained human proofreader - the grammarly.
(It also has different variations for secondary-school and higher-education students (the grammarly).) It's more comprehensive than your normal checker, scanning for 'more than 150 common and advanced grammar rules' (the grammarly). It also takes a look at punctuation and contextual spelling (such as confusion over to, too or 2) - the grammarly. It even checks for plagiarism and produces recommendations if it considers the text has actually been raised. the grammarly.