HowToStudyKorean is a good website to learn from. As for apps, Memrise is a great app, it'...
https://www.90daykorean.com/learning-korean-res...For vocab only, I would try word lists on Naver (English) dictionary, Memrise, And/Or Quizlet (website, app). You can also use Anki (PC software, app) 1 좋아요 이 답변이 도움이 되었습니까? 흠... (...