Apps: Short for ‘applications’, which is another way of saying ‘computer program’. They usually run on a mobile device like a smartphone or tablet – and they can do almost anything (within the limitations of the device)! Fancy turning your phone into a remote control for a toy aeroplane? There’s almost certainly an app for that.
Android: With a logo that's instantly recognisable as a little green man who looks a tiny bit like a seasick Dusty Bin, the Android operating system is probably Apple’s biggest rival. In a nutshell, it's a piece of software developed for smartphones and tablets, and it runs the device and everything on it. A bit like Windows on your computer.