World’s Worst Pet is a free iPad app to help you increase your vocabulary. It contains a series of fun vocabulary games. In the app players have to help bring home Snargg, the world’s worst pet, who has run away. To get Snargg back players have to fill his food dish by learning new vocabulary words. The games are fill-in-the-blank, synonym identification, antonym identification, and definition identification. The app contains a total of 1,000 vocabulary words. Download today and see how you do! Let us know what you think by posting a comment to this post.