The LEGO Harry Potter Years 1-4 game is now available for iOS users, though this one comes with a warning as far as compatibility. At present it will only run on the iPhone 3GS and iPhone 4 as well as the 3rd and 4th generation iPod touch. Furthermore it requires iOS 4.1. That said, the game is a universal app meaning that it will be compatible with the iPad, well, it will be compatible once Apple releases iOS 4.2. Otherwise, it is LEGO and it is Harry Potter. In other words, it sounds like a fun game, sadly though I cannot actually tell you if it is fun because I am stuck waiting on 4.2.
LEGO® Harry Potter™: Years 1-4 brings the world of LEGO® Harry Potter to life on the iPhone, iPod touch and iPad, giving gamers the power to play with LEGO characters and models in a brand new way. Based on the first four Harry Potter books and movies, LEGO® Harry Potter: Years 1-4 builds on the foundations of previous LEGO® videogames by offering a mix of fun, accessible gameplay and light-hearted humor – appealing to all ages. Players can explore the wizarding world and feel as though they are at Hogwarts.
Download [LEGO Harry Potter (App Store link)]