If you have been holding out to upgrade to Studies for Mac, now is a great time to do it. Studies for Mac is currently 30% off the normal price in the Mac App Store ($19.99US).
If you are a Mental Case user, Studies will offer you the choice to migrate all of your existing data when you first launch. Your Mental Case data will remain intact too, so you can easily return to that app should it be needed.
With the new school year just starting, and Studies for iOS a free download, there is no better time to upgrade to Studies.