Duolingo is arguably the most recognized language learning app, known for its game-like interface that makes starting a new language feel fun and accessible. Through points, streaks, and leaderboards, it excels at motivating users to build a consistent daily practice habit. The bite-sized lessons are ideal for learning vocabulary and basic sentence structures on the go. However, the platform offers weak explicit grammar explanations and limited opportunities for real speaking practice, meaning its content can feel shallow for those aiming to move beyond a beginner level. It serves best as an engaging starting point or a vocabulary-building supplement.

LingoDeer is often seen as a more structured alternative to apps like Duolingo. It provides a well-organized curriculum with detailed grammar explanations at the beginning of each lesson, which is especially helpful for understanding complex languages. The app is highly regarded for its courses in Japanese, Korean, and Chinese. While its lesson format can feel repetitive, it builds a solid foundation in grammar and vocabulary for beginner to intermediate learners.