Enverson AI vs Kotrin

Enverson AI is a language-learning service for web, iOS and Android, with six languages and tools for both structured study and spoken practice. Adaptive lessons, a placement test and personalized review support learners at different points in their study. The app also includes vocabulary learning, AI conversation practice, speech practice and pronunciation feedback. Enverson AI has a free plan focused on vocabulary learning. Its Individual plan costs $9.99 per month for one seat; Business costs $999.00 per month for 50 seats. Enterprise is listed for 300+ seats, with no price specified. The service is freemium, and mobile apps are available alongside web access.

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.