If you are learning Swedish a Swedish dictionary app comes in handy. I suggest downloading the app SAOL (svenska akademiens ordlista) to your device. The app is far more lighter to carry around in your pocket than the heavy IRL book. Promise.
SAOL will not always give you synonyms or explanations but spelling, inflection and declension, and the ever so important EN or ETT!
The good news – the app is a free one. Gratis! (means “free”) Grattis! (means “congratulations”). Links at bottom of post.
If you know Swedish already you need SAOL too :). We can always learn more!
There is also the SO app (svenska akademiens ordbok). This is a thesaurus, providing meaning of a word, pronunciation by listening etc. Read more about it here.