This is not going to help you write better any more than naive grammar checkers will, many of which did things like check for passive voice. If you want to write better, check out William Zinsser's On Writing Well.
This statement seems unfair. I'll back up my claims:
1. I help you find errors in your writing. Despite the limitations of spellcheck and misused word detection they are still a valuable safety net to have.
2. The style checker is useful for helping you write better. Writers like to come up with massive lists of pet peeves. Memorizing these lists is too much for a human. After the Deadline automatically flags this stuff. It isn't the same as a human editor but it does help.
3. A good copy editor will flag and revise most cases of passive voice and hidden verbs. After the Deadline doesn't rewrite these for you but it does flag them. This is a useful service to call your attention to these things. See: http://jaffeerevises.com/Nominalizations.htm
4. After the Deadline explains your errors when you make them. When you write in passive voice you can click "explain" and learn what passive voice is. If you use the wrong indefinite article you can click explain and learn why it is wrong. I see these as teachable moments and by giving you snippets of grammar info when you need it, I am helping to make you a more aware writer.
BTW I recommend Write to the Point by Bill Stott. Will checker out Zinsser's work.
