We are launching the TimesTrainer. The name hopefully gives it away – it is a program to drill the times table. The idea has been that you should learn the times table by heart, to almost immediate recall. The trainer poses multiplication problems that you must answer by pressing the correct number.
It has seven levels, from Basic to Expert. At Basic level, you only train 2×2, 2×3 and 3×3, at Expert level you must master the full table. You must answer the problem before the clock (the yellow cheese) runs out. At each level, the clock initially runs slowly, then faster. The idea is to require almost immediate recall before you move on to other problems. The pressure you feel from the ticking clock also has the effect of giving the trainer a slightly game-like feel.
We have used free sounds from SoundBible.com, a highly recommendable source of sound effects.
Update May 11th: Finally available in the App store, after a long week waiting for review. I hope this link works: http://itunes.apple.com/dk/app/timestrainer/id434446864?mt=8