Suggestion on Cellphone apps needed for PARIS

RATP (the official transit company - app has the same name) has an awesome app that I use all the time. It has transit maps with zoom-in features, it gives real time arrival and departure information, travel alerts (closures and detours), route planning, and can use your location to guide you when you need directions. You can choose routes based by time and type. There is also a shopping feature that provides discount links and codes. I am not sure if you prefer an app that can function offline, because this one does not. But if you are ok using data, I highly suggest.

I agree with Monique!

If you look just 5 or 6 questions below your own you will see a virtually identical question with several answers.

https://community.ricksteves.com/travel-forum/france/which-apps-do-you-recommend-for-paris

I've found these apps very useful:

Metro Paris, Google Translate, Le Conjurer, XE Currency Converter, TripAdvisor, Weather Channel, and various photo apps, like Waterlogue, Perfect 365, Enlight.

Thanks Everyone.