I just wanted to let users of the Paris forum know about the great free app from taxi company G7. G7 is one of the top radio taxi companies operating here. And you can make reservations or call for an immediate taxi by using the telephone. They have english speaking operators. But the new feature they offer is an app called "priority" for the iphone. It is fantastic. You order the taxi for immediate arrival or a future time. They show you in real time where the taxi is en route to your pick up. It works very similar to uber but I think is much better. Uber keeps going off line in Paris, so it is not reliable. And much more expensive than using a G7 taxi. The G7 taxi app offers the first two bookings using the app for free. A great deal. Highly recommended.