How can you survive in Paris without planning in advance?
Only 3 Apps you need to know:
1. Time Out Paris
Offline map & GPS, selected sightseeing, selected restaurants & shops(address, open hours, price range, recommended cuisines)
The "bookmark" features and "what's near" by are so useful for arranging your daily schedule.
2. Paris 2 Go (iphone & ipad) $
2. Paris 2 Go (iphone & ipad) $
Offline map, GPS & Metro
Like a "104" service in Paris, you can find almost every shops, department stores, sightseeing, museums from it. (but without open hours and price range)
Although it is not free, but i strongly recommend that you should download it.
Check the metro, RER line & stations.