This app was mentioned in 5 comments, with an average of 1.20 upvotes
https://play.google.com/store/apps/details?id=com.nextTrain
The app you created has pretty much been done here by this guy. It shows the tweets from irish rail and also shows the delays well.
But you app definitely has potential. If you made the Map interactive it would definitely be unique. For example if you could click on the station on the map and see the current trains.
The "Next Train Ireland" app works pretty well for me. It does a nice colour coding of orange when it is a few minutes late and red if it is over 10 minutes late.
https://play.google.com/store/apps/details?id=com.nextTrain&hl=en_IE&gl=US
Next Train Ireland and Next Bus Dublin
Both for Android.
https://play.google.com/store/apps/details?id=com.nextTrain&hl=en_IE
Next Train App is pretty good IMHO.
Next train Ireland for Dart and Irish Rail, very handy