Go to https://api-portal.rtt.io
Sign up to free API
Obtain usage token
Copy usage token into the settings page in the app in API password/token box and save credentials
Leave API Username blank
Search for station by name or CRS code
If date/time you want to search is in the future enable Search Future Times
Select data/time as required
Select Search Location
Tap on train time to bring up list of scheduled stops and arrival times in Service Details window
Service Details will also show transport mode eg Train or replacement bus and operator
You can add station to favourites
Train information data provided by https://www.realtimetrains.co.uk/