Pricing

Solving practice challenges is free, with the full toolchain, waveforms, and netlists. Pay only for more runs or the full course.

✓Every plan includes: waveform, netlist & state diagram viewers · the playground (no account needed) · run sharing · netlist PNG export · progressive hints

Free

£0

Forever

  • Included: All Practice Challenges
  • Not included: Unlimited runs15 runs per day (5 before you sign up)
  • Not included: Bigger, longer simulations64KB code, 60s per run
  • Not included: Priority execution
  • Not included: Watermark-free exports
  • Not included: Fmax timing analysis
  • Not included: Full Learn CurriculumEntire Fundamentals level free
  • Not included: Unlimited runs on course content
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Pro

Best value
  • Included: All Practice Challenges
  • Included: Unlimited runsFair use, every day
  • Included: Bigger, longer simulations256KB code, 120s per run
  • Included: Priority executionYour runs skip the queue at peak times
  • Included: Watermark-free exports
  • Included: Fmax timing analysisReal sky130 critical-path delay on every run
  • Not included: Full Learn CurriculumEntire Fundamentals level free
  • Not included: Unlimited runs on course contentComes with the course, not Pro

The Course

One-off
  • Included: All Practice Challenges
  • Not included: Unlimited runs15 runs per day (5 before you sign up)
  • Not included: Bigger, longer simulations64KB code, 60s per run
  • Not included: Priority execution
  • Not included: Watermark-free exports
  • Not included: Fmax timing analysis
  • Included: Full Learn Curriculum28 topics, 100+ lessons and exercises, all future topics
  • Included: Unlimited runs on course contentLessons and exercises never count against your daily 15

Teams & Education

Course + unlimited runs for every seat, volume pricing, invoice billing, university licenses.

Contact Us

Frequently asked questions

Can I cancel Pro anytime?

Yes. You keep unlimited runs until the end of the period you paid for, then drop back to the free tier. Nothing else changes.

Do I lose my work if I downgrade?

No. Your drafts stay in your browser, and your saved runs, progress, and shared links all remain. The only thing that changes is the daily run budget.

Is the course really one-off?

Yes. Pay once, keep the full curriculum forever, including every topic we add later. It is not a subscription and it never renews.

What is the difference between Pro and the course?

Pro is about volume: unlimited runs everywhere, for heavy practice. The course is about content: the full Learn curriculum, structured from gates to advanced design. If you own the course, runs on its lessons and exercises never count against the daily limit, so you can work through it without watching a counter — the 15-a-day cap only applies to your playground and challenge runs. Practice challenges are free either way. They are independent, and most learners only need the course.

Do you offer student discounts?

All the content except the full curriculum is already free, and the launch discount applies to everyone until August 1. For classroom or cohort licensing, use the Teams & Education contact below.

Prices are shown in your local currency at checkout. Prices include VAT where applicable. Payments are processed by Paddle. Have a promo code? Enter it at checkout.