My teacher Antonio is Awesome!!! But this app is HORRIBLE. Glitching so much that you cannot add new words to your vocab study list. False msg alerts when there are no alerts. The vocab on the app is very minimal and does not recognize some words. Definitions for words that are in the database make absolutely no sense. When you select a time slot for a fture day app scrolls to view availability for today when loading the day you selected. So you then have to scroll back to future day you wanted