Missing the Longgang Line
This app was recently updated, yet it is missing the Longgang line. Also, Im not sure why they give this app an English title, then post all the release notes only in Chinese. Additionally, the message pointing to the shenda station is only in Chinese. Pretty sure most biz folks traveling to Shenzhen wont be able to read this :)
You would be far better off using Google to find a map, then use the iPhone camera to shoot your monitor. Or downloading a hi-res image and synch it. (A screenshot from your iPhone will be too small). Free and more complete than this app. It will also show you the new lines opening in a few months.
Noah Buddy about
深圳香港地铁指南 Shenzhen Hong Kong Metro Guide, v3.0