Plans and access

Access is evaluated on the server. The page you are looking at and the API behind it read the same catalogue, so what you can see and what you can fetch never disagree.

The tiers

Pro opens the whole WinSystemDesign library — every question, concept, quiz, flash card, diagram, pitfall, cheat code and pattern library — plus My Notes across all of it. It deliberately excludes AI.

AI is Pro plus the AI surface: Evaluator AI, Predictor AI, Promotion AI, AI chat and the Interview Intel company breakdowns, with 10,000 credits a month.

Bundle extends the same thing across all four courses.

Interview Sprint includes everything in Bundle, plus the sprint workspace and 25,000 credits a month. See Interview Sprint.

Plans are monthly or yearly subscriptions. Yearly is the same entitlement billed once a year, and it renews automatically like the monthly plan.

Prices are set in rupees for India and in US dollars everywhere else. The pricing page looks up your country from your browser to pick the list, and uses your device time zone when that lookup is unavailable. You are charged in the currency the pricing page shows you. Once you hold a plan, its currency stays with your account. In India the yearly Bundle and yearly Interview Sprint plans are above the RBI ₹15,000 auto-debit limit, so your bank asks you to approve each yearly renewal, and UPI AutoPay is not offered for those plans.

The 90-Day Interview Pass

The pass is for a fixed stretch of preparation rather than an ongoing plan.

• What it includes. Everything in Bundle (with AI) for 90 days: all four courses and every AI feature. It does not include the Interview Sprint workspace.
• One payment of ₹12,999 in India, or $149 everywhere else. The pass is priced in the same currency as the plans you see, and a live plan keeps its currency. Nothing renews. When the 90 days are up, the pass simply ends, and you are never charged again unless you buy another.
• Credits in monthly legs. 10,000 AI credits open at the start of the pass and again at each monthly anniversary while the pass runs. Credits left in a leg do not carry over into the next one. A leg that would open less than 7 days before the pass ends is not granted, so the ticket shows exactly the legs you will get.
• A 7-day read-only grace. AI features stop on the end date. Course content stays readable for 7 more days, so you can finish what you were reading.
• Interview Sprint on top. You can start an Interview Sprint subscription while the pass is running. Sprint starts straight away and the pass keeps running underneath it; if you cancel Sprint, the pass still applies until it ends. Unused pass days are not credited.
• A second pass extends the first. Buying another pass while one is live adds 90 days to the current end date, and its credit legs continue on the same monthly schedule.

The pass is sold to individual accounts only, and it cannot be added on top of a yearly plan. An Interview Sprint subscription already includes everything the pass unlocks, so a pass is not sold on top of one. If you hold a monthly Pro, AI or Bundle subscription, buying the pass replaces it and credits the unused part of your current month against the price. Only time you have paid for is credited: if your latest renewal payment failed, the pass is charged at its full price and nothing is credited for the unpaid month. If that subscription already has a plan change scheduled, the pass waits until the change is resolved. While a pass is running, a Pro, AI or Bundle subscription (monthly or yearly) becomes available when the pass ends; you start it yourself then. Your billing page shows the pass as a ticket with its end date, its credit legs and a pass code to quote to support.

What "free" actually means

Free is not a timed trial. It is a permanent allow-list held in one place, and it grants complete items, not excerpts — a whole question, a whole quiz, a whole concept.

The shape is one free item per category for the long-form types (questions, concepts, quick tips, cheat codes, pitfalls, follow-ups, diagrams), and a short flat list for the types that are not split by category (flash cards, quizzes and the two pattern libraries).

Because the list is per category, the free sample spans the whole library rather than clustering at the front of it.

Why a page is locked

A locked page names the tier that would open it. Three causes, in order of how often they happen:

1. The item is outside the free allow-list and you are on the free tier. This is the ordinary case.
2. Your plan does not include that course. Pro and AI cover WinSystemDesign; WinAI, WinCloud and WinOps need the Bundle.
3. The feature needs AI and your plan has no AI capability. Pro is the common case here — it is a content plan by design.

If you hold a plan that should cover the page and it is still locked, that is a defect rather than a grace period. Apart from the end date of a fixed term or a 90-Day Interview Pass, nothing about entitlement is time-based, so waiting will not change it.

Organisations

Institute and university accounts are provisioned by an administrator. Members get their seat through an invitation email; accepting it attaches the plan to your account.

If you belong to an organisation, do not buy a personal plan — you already hold the organisation's entitlement, and a second one grants nothing extra.

Credits

AI work spends credits. The wallet refills at the start of each billing period and does not carry a balance forward.

Every debit is written to a ledger, visible at Credits in the app, with what was spent and on which feature. If an AI feature refuses while your plan does include AI, check the balance there first — an empty wallet and a missing entitlement produce different messages, and the page tells you which one you hit.

Credits can also be topped up separately from a plan when a month runs short.