STHLM Traveling - SL Planner is a trip planner application for Stockholm, Skånetrafiken, and Västrafik. The application is designed for commuters and visitors who want to plan their trips in Stockholm with SL. It has been trusted by users since 2009 and includes real-time data for metro, bus, tram cars, and trains.

The app has several features like auto-completion of addresses and SL stops, point on the map to select the start or end of a trip, and shortcuts for favorite journeys, nearby stations, and departures. Users can also get real-time departures for metro, bus, trains, and tram cars, as well as traffic status and deviations for the SL traffic. Additionally, the app allows users to buy SMS tickets and offers translations in several languages, including Swedish, English, Spanish, Russian, Arabic, German, French, Italian, Hebrew, and Chinese.

The app requires network communication to get information, location to perform searches based on the user's location, accounts to show maps (this does not mean the app has access to or can read information from the user's Google Account), storage to cache map tiles required by Google Maps, and system tools to prevent sleeping and start at boot to fetch and show deviation notifications.