The big question about BlackBerry OS is the app landscape. Both iOS and Android have robust catalogs of apps and BlackBerry will need some top names to compete. According to BlackBerry, the platform will launch with 70,000 apps, the biggest library for any new mobile platform. The company claims it has 1,000 of the top apps and developers committed to BlackBerry 10. Launch titles will include Skype, WhatsApp, Kindle, SAP, Fruit Ninja,Where’s My Water, Angry Birds, Facebook, Twitter, FourSquare, Sound Hound, Rdio, WebEx, WSJ, box.net and more. Notably absent are Instagram, Spotify, Pandora, Netflix, Hulu and YouTube.