Caltrain Mobile is the official mobile ticketing app from Caltrain, designed to let you purchase and use fares instantly on your phone, anywhere and anytime. With this free app, you can register your debit/credit card or PayPal account in the secure system and you're ready to go. There's no need to carry cash, count exact change, or find a ticket machine.

This app offers the convenience of buying and using fares instantly using your debit/credit card or PayPal account, and you can pay a single fare or multiple fares for a group of riders. You can choose your rider type, station of origin and destination, fare, quantity, and payment before checking out.

This app requires a cellular network or a wireless internet connection to purchase tickets, but you can use your activated tickets offline. You're responsible for making sure you have a valid fare at all times, so watch your battery level and plan ahead.