If you are looking for a Swedish dictionary check out SO (svenska akademiens ordbok). This is a thesaurus with not only explanations and synonyms but also suggestions of how to use the word. You are also able to listen to the pronunciation which is a huge plus! You can type in not only singel words but also phrases, idioms etc.
Another useful feature is that you do not have to know exactly how to spell the word; it gives suggestions if you use the search function.
The app has a word of the day feature.
Free to download, se links below.
Want to learn about SAOL (svenska akademiens ordlista)? Go to this post.