We are going to Paris for 3 nights/ 4 days next week (wb 19/5). Can anyone help me with the best way to pay for travel around Paris. I have searched mumsnet and the web more generally but I am flummoxed. I don’t know if I need a Navigo card or an app or if I buy carnet of tickets directly to my Apple wallet. There are four of us. All adults. All with Apple phones. Can anyone help me?