Everything you need to grow
knowledge that lasts.
A source-assisted concept graph built for self-directed learners. Map, research, and review in one focused workspace — so every new idea strengthens the ones already there.
Concept graph
See how every idea connects.
Build a map of prerequisites, contrasts, and examples instead of a folder of disconnected notes. Drag, link, and reshape it as your understanding grows.
- Live, drag-to-arrange canvas
- Typed edges: prerequisite, contrast, example
- Search across your whole graph instantly
Source-backed research
Expand with cited suggestions.
AI-assisted research proposes new concepts, facts, and edges — each tied to a source you can check before it ever enters your map.
- Citations attached to every suggestion
- Accept, edit, or reject each item
- Credits reserved and refunded transparently
Epistemology
branch of philosophy concerning knowledge
Justified true belief
knowledge = belief + truth + justification
Gettier problem
counterexamples to JTB theory
Adaptive review
Practice what's about to slip.
Accepted concepts become review prompts. A spaced-repetition scheduler picks the next question from mastery state, not a fixed queue.
- Spaced scheduling from mastery signal
- Generated review items per concept
- Keyboard-first practice flow
Recall · 0/12
What distinguishes knowledge from mere true belief?
Mastery tracking
Watch fragile turn durable.
Every answer feeds a per-concept mastery estimate so you can see what's solid, what's fragile, and where the next session should focus.
- Per-concept mastery state
- Adaptive difficulty as you improve
- Stats that update after every session
Streaks & badges
Stay in the habit.
Daily streaks, badges, challenges, and leaderboards turn consistent practice into something you actually look forward to.
- Streaks that survive a missed day
- Challenges and seasonal leaderboards
- Badges for milestones, not vanity
Credit-aware research
Pay only when AI does work.
Reserve, charge, and refund generation credits so expansion stays visible and controlled. No subscriptions — top up once and spend as you go.
- One-time credit packs, never expire
- Reserved credits refund on reject
- Starter grant to try before buying
Build a mind worth keeping.
Start with a free starter grant. Add credits when you want sourced expansion and generated reviews. Your graph is always yours.