Thanks for the app. I stopped using Caltrain a while ago, but this app will be definitely useful for people in bay area. I installed on harmattan and this is what I noticed.
- The icon might look better if you somehow removed that white background (and just retain the black glyph).
- I clicked Select for both From and To, but the station names are not populated. I can only see the header Stops.
- Caltrain has a habit of not running on schedule and not informing people about it. You must have used the crowd-sourced caltrain twitter feed (https://twitter.com/caltrain) where anyone can check the delays etc. A screen to display this feed (as an RSS feed perhaps) would be a great feature for your app.