Duolingo vs StudyPDF

Duolingo offers learning in languages, chess and math through short lessons that adapt to a learner’s level and pace. Language practice covers reading, writing, listening and speaking, with speech exercises, personalized review, offline lessons and a placement test among the listed tools. Challenges, reminders and game-like features provide ways to structure practice. Duolingo says its teaching methods are research-backed and aimed at real-world communication skills. It lists 40 languages and is available on Android, iOS, macOS and the web. The pricing note includes a free plan and a 14-day trial. Other listed products include the Duolingo English Test, Duolingo for Business, Duolingo for Schools, Super Duolingo and Duolingo Max. The English Test is described as AI-enabled and intended to be taken wherever and whenever users perform best. FAQs and service status information are available. Duolingo was founded in 2011 and is headquartered in Pittsburgh, Pennsylvania.

StudyPDF is a study assistant that works with course materials supplied by students. Its assistant, Bo, answers questions with citations to the uploaded sources and can turn those materials into summaries, flashcards, quizzes, practice exams, study guides, cheat sheets and mind maps. Supported inputs include PDFs, scanned or handwritten notes, photos, YouTube videos and websites. For exam preparation, Bo can create a daily study plan that prioritizes weaker topics. It tracks mastery by concept and uses that information to suggest what to study next. Study materials can be exported to PDF, Word or Anki. Students can sign in with Google or Apple or import selected files from Google Drive. Teachers can share course materials through a browser link that students can open without an account; free accounts can save progress. The service is available on the web, iOS and Android, and courses are available offline in the app. The Free plan is free, billed Free forever, with about 4 study sets a week and files up to 300 pages.