Langua vs OpenKoto

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.

OpenKoto is a language-learning app for turning content you choose into reading and study material. It imports URLs and PDF, EPUB, TXT, Word, and Markdown files, then provides automatic translation and vocabulary extraction. In the reader, learners can switch languages in real time, look up words, and parse grammar. An AI assistant offers contextual word explanations, grammar breakdowns, pronunciation guidance, and questions about highlighted text. The app supports learning and transcription in more than 100 languages, including Japanese, English, Chinese, Korean, French, German, Spanish, Italian, and Portuguese. The maker also describes video learning with synchronized subtitles and transcription. Desktop downloads are listed for Mac, Windows, and Linux; native iPhone and iPad apps include offline-first use, vocabulary review, and video subtitles. The maker says desktop data is processed locally and iOS learning data stays on the device, with API keys in the iOS Keychain. OpenKoto is free and open source under Apache 2.0. Its web version is being rebuilt, with vocabulary review, novels, and lyrics planned to sync across platforms.