Learn for free.Go further with Pro.
Every lesson, example, and interactive tool is free — including the custom cryostat builder. Pro unlocks design export, account-backed circuit storage, and raises the qubit ceiling for professional workflows.
Free
Full platform with AI tutor
No credit card required. No time limit.
- Luxo AI tutor — knows your circuit and progress
- 20 AI chat messages per month
- Circuit simulator up to 3 qubits
- Step-through mode with prediction quizzes
- Full cryostat builder with thermal simulation
- Learning dashboard with mastery map and streaks
- 7 learning modules with interactive course
- Share circuits via URL
Pro
For researchers and cryostat designers
Cancel anytime. Billed monthly via Stripe.
- Everything in Free, plus
- Unlimited qubits*
- Save up to 50 circuits with cross-device sync
- Export as OpenQASM and JSON
- Export and import cryostat designs
- Download preset JSON
- Unlimited Luxo AI chat*
- Cloud storage for cryostat designs (up to 20)
- Verified certificates for every mastered module
Custom Cryostat Builder
Design a dilution refrigerator from scratch. Add temperature stages, browse 14 real cryostat components with stage-compatibility indicators, place them with collision-aware auto-placement, and connect signal routes between ports. Validate your design in real time, then inspect it in 3D.
What's included
Everything below is free forever. Pro adds the tools serious builders need.
* “Unlimited” is subject to our fair-use policy. Qubit count is additionally limited by your device's memory (each extra qubit roughly doubles memory and compute). Luxo AI chat is subject to rate limits to protect against automated or abusive use. See Service Limits and Fair Use in our Terms of Service.
All learning content stays free forever — no trial, no expiration. Pro is billed monthly via Stripe. Cancel anytime — you keep access until the end of your billing period.