alllanguageresources.com/learn-japanese-apps/
Curated review of Japanese learning apps organized by skill focus, including comparisons of Pimsleur, Lingodeer, Satori Reader, and other tools for vocabulary, grammar, reading, listening, speaking and writing practice.
Apps and toolsResource lists and enginesSpaced repetitionJLPTListening practiceAppsPodcastsBeginnerQuizzesAdvancedFreePronunciationHandwritingTutors and teachersLanguage exchangeDictionaries