m-ticket STAS is a free Android application developed by the Cityway Team that enables users to purchase and validate transport tickets on the STAS network, the public transport system in the St. Etienne region. This app simplifies the process of validating your transport tickets while travelling. To validate your ticket, all you need to do is activate your phone's Bluetooth, select the number of passengers and tap the "validate my ticket" button. The app will confirm the validation with a beep and display the details of your journey on your screen. In case of inspection, you can simply show your screen to the inspector. Additionally, you can access the parking relays in the region by presenting the QR code at the entry point. With this app, you can purchase single tickets or booklets of 10 journeys, and download invoices for each purchase from the "my invoices" menu.