The most downloaded language learning app in the world. Has quite an extensive Norwegian course.

Mjølnir is a language learning app developed specifically for Norwegian, and with English as a starting point.

Memrise combines language learning with user-generated content and gamified elements. It offers courses in various languages, often created by the community.

Babbel is a subscription-based language learning app focused on practical, real-life conversations.

An app I’ve made for norwegian learners which helps with learning articles & vocabulary training combined with native pronounciation clips of all 2000+ most common words. At this point the app is a little bit old and hasn't gotten an update in a long time, but it's still a fun free resource to use.