Best app, and it works in many cities. – MetrO Review

I've used MetrO for several years, and it is my go-to app for navigating public transportation when I travel. I'm in dozens of different cities every year, and metro allows me to travel like a Local. I've tried a number of different apps, as well as services built into the mapping apps on my phone, but nothing beats MetrO.
Review by ThatDwayne on MetrO.