As technology has developed, the need for accessible and effective language learning tools has grown. This thesis explores users' perception of four language learning apps such as Duolingo, Memrise, Drops and Babbel, and how these apps help with a new language. It includes descritpions of the apps and explains some of the main methods they use, like Spaced Repetition System and gamification. Based on our research, the study analyses users' experiences, pointing out strengths and weaknesses.