The Istanbulkart is a smart card used for public transportation in Istanbul, Turkey. It allows users to pay for rides on buses, trams, ferries, and the metro, making travel convenient and efficient. The card can be easily recharged at kiosks and vending machines throughout the city. Using the Istanbulkart offers discounted fares compared to cash payments, encouraging more people to use public transport. It is a popular choice for both locals and tourists, simplifying the process of navigating the city's extensive transit system while promoting eco-friendly travel options.