For each station you search or each route your save as favourite you can request notifications between certain times. You will then get notified of each train train arriving at your station station or on your route and weather it's been delayed or not. If delayed (by default) the notification will let vibrate your phone to let you know something is wrong with one of your trains or routes.
You can also define a 'home' and 'work' station in the settings to get quick access upon opening the application to the first routes from 'Home to Work' and from 'Work to Home'. This makes you daily home-work traveling lots easier!
Station you often look for are automatically marked as favourite so you have quick access to them during your station search.
Routes you often schedule can as well be saved as favourite route for quick access.
Defining notifications for stations and routes is a cool feature, however right now it is limited to one notification range per station and per route. If you want to schedule more than one notification you will have to buy a pack for that in the application. It's not expensive but it aims to support development of this application through it.
Even cooler is to get these notification right on your wrist using your Android Wear watch!
Traveling abroad? Then Trainfo can also be used. All international trains that stop in a Belgium railway station (like Thalys or Eurostar) can also be tracked with the application.