RemNote vs SecondBrain

RemNote is a learning and note-taking app that turns notes, PDFs, and other sources into AI-generated flashcards, quizzes, and summaries. Its study tools include spaced repetition, practice quizzes, and card formats such as question-and-answer, fill-in-the-blank, lists, clusters, and image occlusion. Users can annotate PDFs and slides with highlights, drawings, and shapes, and source citations are available. Notes and flashcards remain accessible offline and sync when connectivity returns. RemNote offers desktop apps and mobile apps for iOS and Android. The free plan includes unlimited notes and flashcards and synced devices, plus 20 daily file uploads up to 8MB each and 250 monthly AI credits. It also limits free users to three annotated PDFs, five image occlusion cards, and one handwritten document. Pro is listed at $8 a month, and Pro with AI at $18 a month. RemNote was founded in 2020.

SecondBrain turns spoken thoughts, typed notes and content shared from other apps into organized notes, calendar events and reminders. Its AI transcribes, titles and files notes into a folder tree that builds as material is added. Mentioning a date can create an event and reminder, and the app provides a daily morning briefing. Full-text search and an interactive 3D graph help users find notes and explore connections. A shared-memory connector using MCP supports assistants including Claude, ChatGPT, Gemini, Cursor and Claude Code. The connector requires Pro, and connecting ChatGPT also requires Developer mode, which the maker says is available on Plus or above. The maker says notes and calendar events are stored in an EU-hosted Supabase PostgreSQL database with per-account Row-Level Security; voice and text go through Google Gemini's paid API tier, which it says does not train on content. The free plan has limited notes. Pro is $8.99 a month or $34.99 a year; the App Store also lists a second yearly price of 44.99 USD.