On a recent trip to France picked this App up. Its handy for attractions and you can get discounted entry with it. Not all Military stuff.
http://www.visitespassion.info/en/application-smartphone-gratuite.html#.VwqfFHrRWSo
http://www.visitespassion.info/en/application-smartphone-gratuite.html#.VwqfFHrRWSo