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 kuzmycz software:
Number attack is a simple and enjoyable maths game. Regular use will improve the speed at which you perform basic mathematical skills. Keeping your mind young and agile.For students, the application helps strengthen their basic mathematical which is beneficial for every day life. For example, when you go to the store you want to be able to work out how much a group of items cost and how much change you should receive.Number Attack consists of two types of play. Single player and multi player. In single player mode the intent is to get the best score that you can get in 2 minutes. Find the problems too easy? increase the difficulty level.In multiplayer mode, you play with another player in competition or as a team. In competition mode there are two different games duel and tug of war. In duel the player with the highest score after 2 minutes wins. In tug of war the first player to lead by 10 wins. Team mode adds a new dimension. Here the aim is to work with another player to active the best score in the world.For iPad players, there is a tabletop mode that allows 2 different players to play on the same device.If none of your friend are available and you want to play a multiplayer game, you can use Game Center to match you with a player to play with.One more thing, other math games require you to either select one answer from multiple solutions or to type the result. Number attack is different, it allows you to write the answer. It is a very natural. You can work from left to right or right to left. It depends on you.