A free app for Android, by Airweb SAS.

TixiPASS is the first application that allows you to buy transport tickets in 3 clicks. This application offers a faster and more practical way to travel, and to do so in a simple, safe, and secure way. You only need to buy your ticket once and save it on your phone, so you do not need to buy tickets every time you wish to travel.

This application offers the best prices:

You can travel across France on all public transport networks, including buses, train, metro..