I normally track and trend my transportation costs both on a monthly basis. From historical trends, I do know the cost of transport per trip/per work day. It keeps me aware of how much I am spending for transport for my annual budget reviews (SimplyGo is a wonderful tool for that compared to the old NETS Flashpay though there aren't any rebates). There was once I tapped and the bus reader did not display the tap out. I took out my card and tapped to get the message that it was already tapped out. And when I tap out, usually I get a notification that how was the fee. There was no notification from the SimplyGo App. My credit card is set to prompt me whenever there's a transaction charged to it (I had experience with fraud in the past so I am more pessimistic). One day later...