Comparison

Crestellar Academy vs Calcable

Price, ratings, monetisation and update history for both apps, side by side β€” with what reviewers say about each.

Head to head
About

Crestellar Academy

Features
Read full description

The all-in-one HKDSE Maths app for iPhone and iPad β€” 名树 exam questions, timed mock exams, past-paper solutions, revision notes, and every subject's 5** cutoff since 2012. Free to start, no account needed. DAILY PLAN β€’ A short level check, then one free quiz a day aimed at your weak topics: easy first, no time limit, 5, 10 or 15 questions, a daily reminder, and offline once today's quiz is downloaded β€’ After each quiz: your score, streak, level estimate and what improved β€’ Shields and pauses protect your streak; My plan shows your level, calendar, topics and badges, secret ones too β€’ Mark a Long Question "I got it" or "Not yet": your marks count towards your level and topics β€’ Home Screen widgets: your streak and grade trend, an HKDSE countdown, or today's timetable JUPAS CALCULATOR β€’ All 371 programmes at the eight UGC-funded universities and HKMU: admission scores, applications and offers back to 2012 (2026 for HKUST, CUHK, PolyU and HKMU; quartiles where published), tables of admitted students' subject levels where published, applicants per place, and official descriptions β€’ Enter your HKDSE results: your score for 363 programmes, each under its own formula, and where you stand against the median β€” in 2024 too, where the formula is the same β€’ Search, sort four ways and plan 20 choices in Bands A–E like the JUPAS form PRACTICE ENGINE β€’ Thousands of MC and long questions from top HK schools β€” by year, topic and difficulty, plus an out-of-syllabus Challenging tier β€’ Focused practice: almost every question is matched to the subtopic it mainly tests, and you choose which other subtopics it may use β€’ Timed S1–S6 mock exams that mirror the real HKDSE Paper 2, slot by slot β€” your first 2 are free β€’ Instant marking: a grade estimate, per-question review, per-topic time and accuracy β€’ DSE LEVEL PREDICTOR: your mock score is graded on the REAL cut-offs of the last six HKDSE Maths exams, with how many more questions reach the next level β€’ One-tap drill on your weakest topic β€’ Long-question sessions of 5–50, unseen first β€’ Save questions; share a result card 5** SOLUTIONS β€’ Every question has a full marking-scheme solution β€” typeset, never a scan β€’ Max plans unlock advanced solutions: faster 5** techniques, exclusive calculator programs, and Typical Questions & Skills for all 19 chapters WRITE ON THE QUESTION (iPad) β€’ In quizzes, long and saved questions: pens, highlighter and eraser, pinned to the figure as it scrolls and zooms β€” or a scratch sheet β€’ Hold at a stroke's end and it snaps perfect β€” lines, circles, polygons, parabolas β€” then drag its corners β€’ Apple Pencil always draws and double-tap swaps to the eraser; workings are never stored VISUAL MATH LAB β€’ 43 interactive topics β€” Compulsory Part (21), M1 (12) and M2 (13) β€” drag real DSE figures, watch the maths respond β€’ 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 β€” upgrade to interact REVISION TIMETABLE β€’ Plan all 25 HKDSE subjects with official papers and topics: drag blocks, add reminders, or let "Build my week" fill your free hours; a Progress tab tracks mastery FREE TO START β€’ No account needed: HKDSE cutoffs for 15 subjects since 2012, every programme in the JUPAS Calculator, and a question 30 seconds after download β€’ A free account adds your daily plan, full past-paper solutions, illustrated revision notes, the revision timetable, your JUPAS score and choices, and 80 tokens a month FAIR PRICING β€’ Top-up token packs that never expire β€’ Plus, Pro and Max cost a fraction of one tutoring lesson β€’ One subscription covers iPhone and iPad β€’ Your plan stays with the phone number you bought it with Fully bilingual: English and Traditional Chinese. 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

About

Calcable

Features
Read full description

Before exams, formulas alone aren’t enough β€” calculator muscle memory matters. Calcable helps you practice DSE-style scientific calculator operations on your phone so you make fewer miskeys under pressure. **What Calcable offers:** β€’ Practice with two common scientific calculator interfaces (fx-50FH II / fx-3650P II style) β€’ Keys, LCD, Replay, and mode switching that feel close to real devices β€’ DSE operation tips, Learning Center, and calculation history for short daily drills β€’ Scientific calculation, PRGM practice, unit conversion, and retro graphing in one app **Why download:** β€’ Switch models instantly from the top-left control β€’ COMP, SD, REG, BASE, CMPLX, and PRGM modes β€’ Trigonometry, logs, exponents, roots, factorials, nPr / nCr β€’ Fractions, complex numbers, statistics, base conversion, and programming β€’ 40 scientific constants and 23 built-in formulas β€’ Ans memory, Multi-replay, and calculation history **Optional purchases:** β€’ Optional Student and Lifetime Master unlocks for advanced tools If you want exam-ready scientific calculator practice or a powerful everyday calculator, Calcable is built for you.

Screenshots

Crestellar Academy4 screens
Calcable4 screens

Verdict

The call

The clearest difference is ads: Crestellar Academy at none against Calcable's shown. Calcable's advantage is iOS requirement (13.0 vs 18.6). On price, update cadence, in-app purchases and device support there is nothing between them.

Scored on Price Β· Rating Β· Positive reviews Β· Number of ratings Β· Update frequency Β· Ads Β· In-app purchases Β· Monetization Β· Best chart rank Β· Devices Β· Requires iOS

CostPrice Β· In-app purchases Β· Ads Β· Monetization

Both are free to download. Crestellar Academy sells 10 in-app purchases, starting at $4.99 per month and Calcable sells 4 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Crestellar Academy ships an update weekly, Calcable every 5 days. The most recent releases landed on October 30, 2026 and October 31, 2026 respectively.

Scorecard2 real differences Β· 4 level
Crestellar Academy versus Calcable: the parameters behind the verdict, then further details
ParameterCrestellar AcademyCalcable
PriceFreeFree
Update frequencyWeeklyEvery 5 days β€” better
AdsNo β€” betterYes
In-app purchasesYesYes
DevicesiPhone, iPadiPhone, iPad, iPod β€” better
Requires iOS18.613.0 β€” better
Further details β€” not scored
Size85 MB38 MB
Age rating12+4+
DeveloperCrestellar Academy LimitedOphyin AI Limited

In-app purchases

10 purchases

Crestellar Academy

Subscriptions8
  • Plus$4.991 Month
  • Pro$9.991 Month
  • Max 5x$14.991 Month
Show 5 more
  • Max 20x$34.991 Month
  • Plus$49.991 Year
  • Pro$99.991 Year
  • Max 5x$149.991 Year
  • Max 20x$299.991 Year
One-time2
  • 500 Tokens$5.99
  • 2,000 Tokens$19.99
4 purchases

Calcable

One-time4
  • AI Credit Pack$1.99
  • AI Monthly Pass$1.99
  • Student Pro$5.99
Show 1 more
  • Master Pro Lifetime$11.99

Questions

Is Crestellar Academy free?
Crestellar Academy is free to download, with in-app purchases available.
Is Calcable free?
Calcable is free to download, with in-app purchases available.
Do Crestellar Academy or Calcable have ads?
Calcable shows ads; Crestellar Academy does not.
Which is updated more often, Crestellar Academy or Calcable?
Crestellar Academy ships an update weekly, and Calcable every 5 days. Most recently, Crestellar Academy was updated on October 30, 2026 and Calcable on October 31, 2026.

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