Free quizzes. Then Bucky, then Premium.

Practice quizzes are unlimited and free. Signing in starts a 7-day Bucky AI trial (50 explainer asks a day). After day 7, Premium is S$12.98/month or S$79.98/year.

Free

S$0/ forever

The practice bank. No account needed. Bucky (the AI explainer) is a separate cap, not the quizzes.

Start practising

Unlimited practice quizzes (569 questions)
Quick quiz, Paper 1 / Paper 2 drills, timed mock
Daily challenge, streaks, XP
Written explanation on every answer
After you sign in: 3 Bucky AI asks/day (when not on trial)

7 days free

Premium

S$12.98/ month

or S$79.98/year (about S$6.67/mo). First 7 days free, no card.

Bucky is the AI explainer that answers why, from the study notes, with citations. That is what the 7-day trial unlocks, not extra quiz questions.

Everything in Free, still unlimited quizzes
Bucky AI explainer: 50 asks/day
Ask Bucky from any quiz question
Answers grounded in the study notes, with sources
Trial starts when you sign in. No card today.

Free vs Premium

Feature	Free	Premium (after 7-day trial)
Practice question bank	Unlimited, free	Unlimited, free
Written explanations on every answer	Yes	Yes
Quick quiz / Paper drills / timed mock	Yes	Yes
Daily challenge and streaks	Yes	Yes
Bucky AI explainer	3 asks/day	50 asks/day
Price	S$0	S$12.98/mo or S$79.98/yr

How we compare to HowToPassRES

There are a few paid RES prep apps out there. HowToPassRES is the biggest. They sell a big question bank. We give you a free one plus two things that actually move a score: answers that cite their source, and Bucky, who explains why.

Show the head-to-head comparison

Feature	HowToPassRES	RES Exam Paper
Explanations + sources on every answer	Premium, no sources	Free, cited
Grounded AI tutor (asks "why")	No	Premium, citation-backed
Timed mock exam	Premium	Free

Start with the free bank and see whether sourced explanations change how you revise. Most people do not go back.

Prices in Singapore dollars, GST-inclusive. Checkout is not taking cards yet. Sign in for the 7-day Bucky trial now. The numbers above are what Premium will charge when checkout opens. Bucky caps reset daily. Practice quizzes stay unlimited either way.

On this page

Free vs Premium
Common questions
Why Bucky is Premium

Common questions

Is Bucky really grounded in the study notes?

Yes. Before Bucky answers, we retrieve the most relevant study-note chunks from the official syllabus material and instruct it to answer only from those sources, citing each as [1], [2], and so on. If the notes do not cover something, it says so. It will not guess.

What is limited: quizzes or Bucky?

Quizzes are unlimited and free. The daily cap is only for Bucky, the AI explainer. Trial and Premium: 50 Bucky asks a day. After the trial on Free: 3 Bucky asks a day.

How does the 7-day trial start?

Signing in with Google starts it. You do not click a second start button. After 7 days it ends on its own. Premium is then S$12.98/month or S$79.98/year once checkout is live. No card is taken today.

How do I cancel?

There is nothing to cancel during the trial. It ends on its own. You keep unlimited quizzes and 3 Bucky asks a day. No card, no billing portal yet.

Why is Bucky not free like the quizzes?

Every Bucky answer costs real model inference. The free 3/day cap lets you try it. Paid plans cover heavier use so the question bank can stay free for everyone.

Why Bucky is Premium

The RES exam rewards precise, examinable answers, not vibes. Bucky reads the same syllabus-derived study notes you are tested on, and it shows its sources. That is the fastest way to go from "I got this wrong" to "now I understand why".

Practice is free. Sign in when you want Bucky on the hard questions.