While preparing for my own travels, I also had to sort out local transport logistics for the city I was visiting. In Dubai, for example, the public transit system is super convenient, but it helps a lot to keep an eye on your card before you start your day. I used this tool to do a https://nolcardbalancecheck.org/ nol card refund and balance check online, and it saved me from running low on credit mid-journey  especially when hopping between metro, bus, and tram.