Kotrin vs Langua

Kotrin is an AI-powered app for learning Japanese, with connected practice in speaking, listening, reading, and writing aligned to JLPT levels. Its lesson library advertises more than 5,000 lessons for beginner through advanced learners. Practice includes everyday exchanges set in places such as shops and cafés, as well as AI role plays with back-and-forth responses. Lessons cover hiragana through Jōyō kanji, including stroke-order and recognition practice. Kotrin builds a language profile across 1,536 dimensions and adapts difficulty, focus, and scenarios to progress. Its AI-powered content system can create personalized Japanese lessons from a word or idea. The app is listed for iOS, Android, macOS, and Windows, but is currently available only in English. The free plan includes selected lessons, personalized learning, quizzes, and vocabulary practice, subject to daily practice limits. Pro is listed at $10 a month or $90 a year, both tax excluded, and another Pro listing is ¥1,650 a month. Subscriptions renew automatically unless cancelled; monthly and yearly purchases are non-refundable under the stated terms.

Langua is an AI language tutor for conversation practice, with instant feedback and access to practice at any time. Learners can use roleplays, debates, vocabulary exercises and conversations tailored to their interests. Feedback options include correction styles, grammar drills, conversation reports, audio summaries and transcripts with words available for translation. Learners can save vocabulary, review it with spaced-repetition flashcards and create stories featuring saved words. Langua also offers level-matched podcasts and videos, plus the option to import personal content with interactive transcripts synchronized to audio. It lists 23 languages, with multiple dialects available for many. A conversation can be started without subscribing. The Free plan includes approximately 20 standard chat messages per week and 3 minutes of Call Mode per day. A Pro trial requires a card and lasts 5 days on a monthly plan or 7 days on an annual plan. Subscriptions work on web, iOS and Android, with progress synced across devices. Langua recommends Google Chrome for web use. Its privacy policy says users can delete chat transcripts, and voice recordings are not stored unless enabled in Settings.