I knew that there were a lot of similar apps on the AppStore but I went with my conviction that less is more. Nearly all the apps are multifunctional and include journey planners, maps, alerts etc etc.
As a Londoner, I know my way around, the only thing I want to know is if the tube is even working – this is how Lines was born. I've tried to make the app's simplicity it's main selling point and hope I've achieved this to some degree.
Simple question, though: what's the story behind the Metro article? Your story is interesting enough that it makes for good reading anyway, but I was wondering (and absolutely no offense intended -- there's nothing wrong with it imo) if you had a contact/friend/similar who helped you get the article? Again, congratulations, I hope your app continues to sell well.
I actually was doing something similar (well, the very same actually) a few months ago, got to a working version, but then saw that there were already plenty of options, got discouraged, and suddenly lost all interest in polishing/publishing it...