And who thought technology could be so pretty?! The design on the app is really chic, the pretty illustrations were done by Elaine Biss.
If you are planning a trip to Paris any time soon you have to get this! (If you have an iPhone obviously!) Or just get it and plan your next trip to Paris around the seasonal markets... one on my list being Lille's Grand Braderie in September. (check out Home Shopping Spy's great review of last year's event)
Buy the app here or search for Keys to the Fleas on your iPhone app store. (its only £1.19!)
Now we just need an app like this for the UK!