Lernoa vs Retain

Lernoa is a study application for turning documents or topics into structured courses and for building, importing, and studying flashcard decks. Upload a PDF or DOCX, or enter a topic, and it can create chapters, quizzes, and a final exam. AI features include summaries, flashcards, quizzes, and narrated audio with read-along highlighting. Course and document chat answers are based on the supplied material and include source citations, within a small daily question allowance. Review uses an Anki-style SM-2 scheduler and retires cards recalled reliably over long intervals. Anki and CSV decks can be imported, decks exported as CSV, and courses moved in Markdown or text formats. Lernoa connects to Claude, ChatGPT, and other Model Context Protocol assistants; generation uses credits. The first chapter of each course is free, while later chapters cost one credit each. It runs on Android, iOS, and the web, with a free plan and no free trial.

Retain is a flashcard app for Android, iOS, and the web. It uses AI models and learning science to create personalized learning plans: learners set a goal and receive a plan, and the AI can generate flashcards from uploaded PDFs. The site lists PDF, PNG, and JPEG uploads; its onboarding also names images, YouTube videos, GoodNotes notes, and Notion notes as learning sources. Card options include cloze, image occlusion, and custom Anki types, with mixed card formats and study modes and adaptive review. Decks and individual cards can be shared by link. The company also offers B2B licenses to businesses and educational institutions, with pricing available by contacting Retain. Its privacy policy says usage data, including flashcards and learning progress, may be analyzed in aggregated and anonymized form to improve AI models and algorithms.