This app was mentioned in 3 comments, with an average of 1.67 upvotes
Also, download this app for traveling in Stockholm if you have a android phone.
https://play.google.com/store/apps/details?id=com.markupartist.sthlmtraveling
Jag använder STHLM Traveling (ej att förväxla med "Res i STHLM").
This is a great app for planing public transportation in the Stockholm area: https://play.google.com/store/apps/details?id=com.markupartist.sthlmtraveling