# Crestellar Academy

> Mock exams · past papers · 5\*\*

Canonical page: [https://chrome-stats.com/d/id6670178477](https://chrome-stats.com/d/id6670178477)

## Overview

- **ID:** `id6670178477`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Crestellar Academy Limited
- **Category:** Education
- **Version:** 4.1
- **Last updated:** 2026-09-12
- **First published:** 2025-11-24
- **Size:** 68 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/crestellar-academy/id6670178477)
- **Website:** [https://www.crestellaracademy.com/](https://www.crestellaracademy.com/)
- **Privacy policy:** [https://www.crestellaracademy.com/privacy-policy](https://www.crestellaracademy.com/privacy-policy)

## Description

The all-in-one HKDSE Maths self-study app for iPhone and iPad — real 名校 exam questions, timed mock exams, past-paper solutions, revision notes, and every subject's 5** cutoff since 2012. Free to start, no account needed.

NOW ON iPHONE
• The whole app on your phone: quizzes, mock exams, long questions, past papers, notes, the timetable and Home Screen widgets, laid out for a phone — one account, one subscription, both devices
• Writing on the question stays iPad-only for now

PRACTICE ENGINE
• Thousands of real MC and long questions from Hong Kong's top schools — filter by year, topic and difficulty, or take on the out-of-syllabus Challenging tier
• Timed S1–S6 mock exams that mirror the real HKDSE Paper 2, slot by slot
• Instant marking with a grade estimate, per-question review, per-topic time and accuracy
• DSE LEVEL PREDICTOR: your mock score is converted using the REAL cut-offs from the last five years of HKDSE Mathematics — see where you sit and how many more questions reach the next level.
• One-tap drill on your weakest topic
• Long-question sessions: 5–50 per session, unseen questions first
• Save questions to revisit; share a result card in one tap

5** SOLUTIONS
• Every question has a complete marking-scheme solution — natively typeset, never a scan
• Max plans unlock advanced solutions: faster 5** techniques, exclusive calculator programs, and Typical Questions & Skills for all 19 chapters

WRITE ON THE QUESTION (iPad)
• In a timed quiz, the Long Question bank or any saved question: pen, dotted pen, highlighter and eraser, pinned to the figure so they scroll and zoom with it — or pull up a blank scratch sheet
• Hold at the end of a stroke and it snaps perfect — lines, circles, rectangles, triangles, parabolas — then drag its corners; one undo puts your freehand back
• Apple Pencil always draws and double-tap swaps to the eraser; workings are never stored

VISUAL MATH LAB
• 43 interactive topics across three papers — Compulsory Part (21 labs), M1 Calculus & Statistics (12 labs: exponential growth, maxima & minima, trapezoidal rule, Bayes' theorem, random variables, binomial/geometric/Poisson, normal distribution, Central Limit Theorem, confidence intervals and 3 shared) and M2 Algebra & Calculus (13 labs: linear systems, matrices, vectors, limits, curve sketching, related rates, integrals, volumes, trig identities, binomial theorem, induction) — drag real DSE figures, watch the maths respond
• Every lab runs on iPhone and iPad; AM–GM, Circle Angle Theorems, M2 Systems of Linear Equations and M1 Central Limit Theorem are free with no account; the rest are free to read — upgrade to interact

REVISION TIMETABLE
• Plan all 25 HKDSE subjects — official names, papers and topics; drag to build your week, clashes nudge to the nearest free slot
• Revision, test, mock and homework blocks with optional reminders; "Build my week" fills your free hours; a Progress tab tracks mastery

STAY ON TRACK
• Home Screen widgets on iPhone and iPad: your practice streak and grade trend, a live HKDSE countdown, or today's revision plan
• In the app: the same countdown, streak and grade trend, plus an optional evening study reminder
• Every attempt saved with full per-topic history

FREE TOOLS (no login needed)
• HKDSE cutoff scores: 16 subjects, every year since 2012, in interactive charts
• Past-paper solutions and complete illustrated revision notes, natively typeset
• Guest mode: your first question 30 seconds after downloading

FAIR PRICING
• 80 free tokens every month, on every account — the free tier is real
• Top-up token packs that never expire
• Plus, Pro and Max plans cost a fraction of one tutoring lesson

Fully bilingual — switch between English and Traditional Chinese any time.

Built by Hong Kong DSE Maths teachers. Download free and aim for your 5**.

Terms of Use (EULA):
https://www.apple.com/legal/internet-services/itunes/dev/stdeula/

Privacy Policy:
https://www.crestellaracademy.com/privacy-policy

## Rankings

- #1,417,938 — Overall

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Source: [Chrome-Stats](https://chrome-stats.com/d/id6670178477)