The first maths trainer app was developed in May of 2011 using Flash Professional. It was designed to assist with Logarithms.
I carried on developing further Training Apps: from Maths, to sciences, to history and trivia - but all with a view towards learning and education.
Since the original Logarithms Trainer, I have now published more than 20 apps (many free), with no advertising to distract.
Ranging from Maths to Music and utility, these apps use features of IOS including database, internet and Bluetooth.