Pricing

£5. Once. For life.

No subscriptions. No tiers. No ads, ever. Pay once, get everything forever.

Mock mode: No Stripe key configured. The upgrade button will instantly unlock premium for testing. Add STRIPE_SECRET_KEY + STRIPE_PRICE_ID + STRIPE_WEBHOOK_SECRET to enable real payments.

Lifetime

£5one-time

Instant unlock of all 140 green book problems (no daily streak required)
30 premium extra problems, harder than green book equivalents (daily-paced)
AI hints, walkthroughs, and reasoning evaluation (powered by OpenRouter)
No ads forever
Support the project — and The Woo

Free

£0always

All 140 green book problems (one per day)
Daily streak tracking
3 progressive hints per problem
Step-by-step solution walk-throughs
Reasoning workspace
No instant unlock — daily pace only
No premium extras

Start free

Questions you might have.

Why so cheap?: Because £5 is what people will pay without thinking. The goal is adoption, not revenue. The math is the same regardless of price.
Is this a subscription?: No. £5 once, lifetime access. No recurring charges. No tier upgrades. That's the deal.
Refund policy?: If you email The Woo within 30 days and ask for a refund, you get one. No questions, no friction.
Can I share my account?: No. Account sharing is detected (concurrent sessions, IP velocity, device fingerprinting) and the account is suspended. The £5 isn't the issue — the integrity of the streak system is.
Do I lose my streak if I upgrade?: No. Upgrading preserves your streak. Premium users still see today's problem; they just also get instant access to all others.

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