You can easily create a route by selecting the start and end station from a list, or letting the application find the station nearest to you. Junailija gives you a list of trains serving the route, and you can also view detailed information about any train.
Junailija uses the Digitraffic open data API published by the Finnish Transport Agency (Liikennevirasto), which provides timetables, actual times and estimates. Note that there may be technical breaks in the availability of the information, and any estimates are non-binding. Junailija cannot show routes that require one or more train changes, because this information is only available from the train operator. Similarly, ticket purchases and seat reservations can only be done through the operator.
Please give feedback about the application from the Settings view. Read the terms and conditions of use before downloading (available in Finnish only).