Bloons Tower Defense 4 (iPhone/iPod Touch) is Bloons TD 4 for the iPhone and iPod Touch. The icon has the Mortar Tower on it. The iPhone/iPod Touch version of Bloons TD 4 is very similar to the online, Flash version of the game, and has the same choice of towers, the same upgrades, and the same ranking system. You can also save your game without a Ninja Kiwi account (formerly MochiGames) Unlike the Flash version, you can save your game DURING freeplay mode, so you can exit freeplay mode and still continue from the last round finished.