I came to Tokyo more than 10 years ago when there were still feature phones. The email app was fast and easy to use, looking up train connections through the pr

I came to Tokyo more than 10 years ago when there were still feature phones. The email app was fast and easy to use, looking up train connections through the pre-smartphone WAP browser was slow and a pain. I was looking up train connections so often that this became too painful and built an app that would accept from/to train station pairs via email and send you back the best connection.