Just come across this (as you do) and thought it might be useful for some:
Available in A-level format, the mathscard® is a compact *** sized information sheet that folds out to reveal an incredible amount of maths formulae for both school and revision use (roughly A4 in size).
The A-level app contains all of the really useful pure maths formulae you get on the printed cards, but with the added advantage of having it available on your mobile at the touch of a button, making it ideal for home and revision use.
Just like the printed card, the mathscard® app is completely free of charge and, even better, works on over 150 different devices, including Nokia, Samsung, Sony Ericsson, Android, iPhone, iPod touch, BlackBerry, and many more!*
A GCSE version of the app is scheduled for release in April 2011.
............ and you can get it from here: http://www.mathscard.co.uk/home/