The "Download Now" link directs you to the iTunes App Store, where you must continue the download process. You must have iTunes installed in order to open the link, and you must have an active iTunes account to download the application. This download may not be available in some countries.
From Games by John:
How many earths would fit inside the sun? And how long was the Berlin wall? Prove your general knowledge in this unique multiplayer quiz game. Challenge your friends and compete with others in real-time over 3G or WiFi. Win matches, increase in level, and work your way up the global ranking to reach #1! The Lite version lets you try BrainBattles with 200 questions from the full database of over 1500 questions. VERSUS MATCHES OVER 3G OR WIFI - Two players are presented with 10 questions and the goal is to complete the quiz in the shortest time possible, while tracking your opponent's progress at the same time. WIDE VARIETY OF QUESTIONS - Divided into 10 categories covering Food & Drink, Geography, Games, History, Language, Literature, Music, Science, Sport and TV & Film. GLOBAL RANKING - Compare your results with others and work your way up the ranking to become number 1! LEVELLING SYSTEM - Win matches to increase in level from 1 to 50.