We also have apps like 9292 or NS Reisplanner that combine trains, trams, buses, and metros into one route planner. The fact that you can use the Chipkaart for

We also have apps like 9292 or NS Reisplanner that combine trains, trams, buses, and metros into one route planner. The fact that you can use the Chipkaart for practically all land transportation is also amazingly convenient.