To install a widget you just need to longpress with your finger in any point of the desktop and a menu will appear allowing to set the widget.
Perfect for making a quick look to see your next train without needing to enter any app.
Have all the information that you need in your Android screen.
In a simple way, you will be able to view what's the next train that stops in the station selected and without internet! (For example if you're inside a underground tunnel)
If you have any doubt or suggestion, send us an email to: firstname.lastname@example.org