Each event is stuffed with information about what is going on and when, as well as a map to take care of the where. Each category of event has its own symbol, via which you can see other similar events. Within the app you can find all the London 2012 social feeds, as well as travel and accessibility guides, and ticketing news (although that ship has well and truly sailed). You can upload photos of yourself at events, check in, and so on. There are also augmented reality features, for those phones and tablets that can handle such things.

Downsides? Well, we could have lived without the constant interference of adverts for/'useful' links to London2012.com. And London 2012 Join In does require regular web and GPS connectivity to work properly. The first time we opened it London 2012 Join In downloaded just shy of 30MB of data, and it needs to suck up updated info every time you open it, as well as making use of your GPS, of course. (You are warned about this before you install.)

Our verdict:

London 2012 Join In is a comprehensive source of information, easy to use, and nice to look at. If you want to get something more out of this special summer, install this free app.