Smart Note-Taking
Capture ideas your way with 34 block types — from rich text and handwriting to code, math, audio recordings, and embedded PDFs. Every note is a living document that grows with your understanding.
- 34 block types: text, drawing, code, math, audio, PDF, and more
- Freeform canvas with Apple Pencil support and stroke smoothing
- Organize with notebooks, projects, and nested pages
- Full markdown support with slash commands
On-Device AI
Summarize lectures, generate flashcards, create quizzes, and get writing assistance — all powered by Apple's Foundation Models running entirely on your device. Your notes never leave your hardware.
- AI summarization, flashcard generation, and quiz creation
- Runs on Apple Silicon — no internet required
- Zero data sent to external servers
- Optional cloud AI providers for advanced use (bring your own key)
Spaced Repetition
Turn your notes into knowledge with SM-2 spaced repetition flashcards. Highlight text to create cards instantly, import from CSV/TSV, or let AI generate them from your notes. Review at the scientifically optimal time.
- SM-2 algorithm — the same proven system used by medical students
- Create flashcards from highlights, AI, or manual entry
- Study dashboard with due cards, streaks, and mastery tracking
- Import from CSV/TSV (Anki-compatible)
Persona System
Synthesis adapts its entire interface to how you learn. Students get study tools and gamification. Young students get a simplified, colorful experience with parental controls. Professionals get a streamlined workspace focused on productivity.
- Three personas: Student, Young Student, Professional
- UI complexity, language, and features adapt automatically
- Gamification with badges, streaks, and XP for students
- Parental controls and age-appropriate content for young learners
Knowledge Graph
Your notes are more than isolated pages. Synthesis builds a knowledge graph from backlinks, tags, and AI-detected connections — revealing relationships between concepts you might have missed.
- Bidirectional backlinks between pages
- Visual knowledge graph explorer
- AI-powered page similarity suggestions
- Semantic search across all your content
Canvas & Drawing
A full freeform canvas with Apple Pencil support, stroke smoothing, layers, and shape recognition. Sketch diagrams, annotate PDFs, or take handwritten notes — seamlessly mixed with typed content.
- Apple Pencil with pressure sensitivity and tilt
- Pencil Pro squeeze gesture support
- Stroke smoothing, layers, and shape recognition
- Inline drawing blocks within any page
Everything you need to learn better
iCloud Sync
Seamless sync across all your devices with end-to-end encryption. Your notes are always up to date on iPhone, iPad, Mac, and Vision Pro.
Widgets & Siri
Home screen widgets for quick access to recent pages and study stats. Siri Shortcuts for hands-free note creation and flashcard review.
Focus Mode
Timed study sessions with Pomodoro-style breaks and distraction-free single-page focus. Track study time and get session summaries.
PDF Export
Export any notebook or page as a polished PDF with auto-generated table of contents from your headings. Share your work professionally.
Gamification
Earn XP, unlock badges, maintain study streaks, and track progress across subjects. Learning should feel rewarding.
Templates
Start fast with built-in templates for Cornell notes, lecture outlines, study guides, meeting notes, and more. Create your own templates too.
Start free. Upgrade when you're ready.
All core features are free forever. Upgrade for multi-device sync, cloud AI, and professional tools.
Free
$0
- Unlimited notebooks & pages
- All 34 block types
- On-device AI features
- SM-2 spaced repetition
- Gamification & badges
- 1 device
Synthesis+
$2.99/month
or $19.99/year (save 44%)
- Everything in Free
- Multi-device iCloud sync
- Cloud AI providers
- Unlimited exports
- Premium templates
Synthesis Pro
$7.99/month
or $49.99/year (save 48%)
- Everything in Plus
- Professional persona
- Knowledge graph
- Automation rules
- Priority support