As noted by Apple, bundles, which are new with iOS 8, “let you download multiple apps and games from the same developer at a special price. Plus, if you already own one or more of the titles, you’ll get the rest of the bundle at a reduced price.”
For example, under App Bundles, you can find the Ultimate Productivity Bundle by Readdle, which offers PDF Expert 5, Printer Pro, Scanner Pro, and Calendars 5 all for just $19.99, instead of their total regular price of $30.96.
Under Game Bundles, there’s the Angry Birds: Ultimate Slingshot Bundle from Rovio, which includes Angry Birds, Angry Birds Seasons, Angry Birds Space, and Angry Birds Star Wars all for only $1.99, instead of $3.96.
And under Kids Bundles, there’s the Disney Princess Play Pack from Disney, offering Disney Princess Royal Salon, Brave: Storybook Deluxe, Princess Dress-Up: My Sticker Book, and Tangled: Storybook Deluxe for only $7.99, down form their total price of $12.96.