The TramChallenge app allows you to participate in the Helsinki Tram Challenge - how fast can you visit all the tram stops in Helsinki?
You can register and time your attempt, get tram line and stop information, and you can track the trams as they move around so you can optimise your route.
The TramChallenge app is the only way to get onto the official leaderboard. See the rules on tramchallenge.com, and good luck!