Learn deeper, faster with your AI study partner
Ask questions, annotate passages, start focused threads, and keep organized study memories — all in a single, private workspace.
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Revising beliefs based on new evidence.
Start with a prior probability
It's your starting assumption.
e.g., "I'm 50/50 sure."
A learner’s paradise
Built for deep focus and effortless organization.
Conversational AI
Natural, multi-turn chat that understands context across messages.
Threaded Study Notes
Turn any selection into a focused thread for deep dives and follow-ups.
Highlight & Annotate
Select text to create annotations or ask targeted questions instantly.
Multimodal Input
Paste text, upload attachments — get structured, clear responses and summaries.
Organized Memory
Keep replies, threads, and past conversations easily discoverable.
Privacy First
Your study workspace is private and secure, built for your personal growth.
How Lucidity works
Start a Conversation
Type a question or paste course notes and get an immediate, clear answer.
Turn Highlights into Threads
Select any passage to create a thread for deeper exploration or revision.
Revisit & Build
Save helpful threads, export notes, and track your learning progress.
Built by a passionate founder
Dedicated to creating tools that empower learning and productivity.
Learning should be accessible.
Join thousands of students and self-learners building their study memory today.
Free
Full access to core features
- Unlimited threads
- Multimodal file support
- Highlights & Annotations
Pro
For power users and professionals
- Everything in Basic
- 5,000 units/month (5x more)
- Access to premium models
- Priority support
Register to be notified when we launch
Feedback welcome — help us build the future of learning.