Show HN: Tube Tracker, an iOS App for the London Underground

Hi, I'm the creator of Tube Tracker. In its first two years, a colleague and I built the departure board section. After going solo, I've spent almost all the free time over the last year building this app into what you see today. I don't have any funding or staff. It's taken a lot of work, and a lot of luck, but this week my app is being displayed on the front page of the UK App Store. I'd love to hear what you guys think of it.