Comparison

Keystone Exam Prep vs MathMemoAR

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

Head to head
About

Keystone Exam Prep

Prepare for competitive exams with extensive mock tests and practice questions. Access daily current affairs, quizzes, and detailed performance analysis. Offers multilingual support for a personalized learning experience.

Highlights
  • Mock tests for competitive exams
  • 50,000+ practice questions
  • Daily current affairs
  • Daily free quizzes
  • Detailed performance analysis
  • Multilingual support
Read full description

Welcome to Keystone Academy: Exam Preparation App | Mock Test | PYP - The most trusted exam preparation app for competitive exams. Supported by a community of 2 crore+ students. With various sectors such as railways, banking, SSC, etc., exams like SBI Clerk & SBI PO, SSC CGL, SSC CHSL, SSC GD Constable, MTS, RRB Group D & JE, DFCCIL, UP Police SI, DSSSB, RRB NTPC CBT 2, RRB NTPC ASM Psycho, Airforce Group X, Airforce Group Y, IBPS RRB PO & Clerk, IBPS SO, RVUNL, UPSSSC PET, IBPS PO, IBPS Clerk, UPSC IAS, MP Police Constable, REET, SUPER TET, CTET, SSC CPO, MPPSC, Navy AA, and SSR, UPTET, UP B.Ed JEE, WBP, SSB, School Level - All India & State Board, etc., we aim at providing the best learning environment with an end-to-end Examination model. We’ve introduced Free mock tests. Download the Keystone Academy app and avail of the following: Free Practice Sets of 50,000+ questions for better revision and practice A set of 300+ Govt & Banking Recruitment Exams Daily Current Affairs Daily Free Quizzes Detailed smart analysis based on your performance with pointers to improve Multilingual- To enable students with the preparations in their preferred language Install the Keystone Academy app today & get the latest exam-related updates. Our live classes & online courses are designed to build your confidence.

About

MathMemoAR

Features
Read full description

Turn abstract math formulas into unforgettable 3D experiences! MathMemoAR transforms the way you learn geometry and algebra. Point your camera at any surface and watch mathematical formulas come alive as interactive 3D models you can walk around, scale, and explore from every angle. WHY MATH MEMO AR WORKS ◆ SEE IT IN AR Place formulas directly in your room. Walk around a 3D cube to understand volume. See how the Pythagorean theorem actually works with colored squares on each side. Learning becomes intuitive when you can touch and explore. ◆ MEMORY STORIES THAT STICK Every formula comes with a clever mnemonic story. "A = π × r²" becomes "A PIRATE (π) times ROSES squared (r²)" — weird, funny, and impossible to forget. These memory hooks are based on proven techniques used by memory champions. ◆ DUAL VIEW MODES Switch between AR mode (place in your real world) and 3D mode (rotate freely on screen). Learn anywhere — with or without AR support. ◆ TEST YOUR KNOWLEDGE Each formula includes an interactive quiz. Earn up to 3 stars and track your progress across all formulas. ◆ BILINGUAL SUPPORT Full support for English and German — switch languages anytime in settings. WHAT'S INCLUDED Free: - 5 essential formulas to get started - Full AR and 3D visualization - Memory stories and quizzes - Progress tracking Premium (one-time purchase): - All 20 formulas unlocked - Geometry: Rectangle, Triangle, Circle, Parallelogram, Trapezoid, Rhombus - 3D Shapes: Cube, Cuboid, Cylinder, Sphere, Pyramid, Cone - Algebra: Pythagorean Theorem, all 3 Binomial Formulas - Perimeter and circumference formulas PERFECT FOR - Students preparing for exams - Visual learners who struggle with abstract concepts - Teachers looking for engaging classroom tools - Anyone who wants to finally remember those formulas - Homeschool families - Adults brushing up on math basics BUILT DIFFERENT This app was created by combining 20+ years of professional experience with cutting-edge AI-assisted development. Every visualization is carefully designed to make the math click - not just memorized, but truly understood. No subscriptions. No ads. One purchase unlocks everything forever. Download MathMemoAR and see math like never before.

Screenshots

Keystone Exam Prep4 screens
MathMemoAR4 screens

Verdict

The call

The clearest difference is iOS requirement: Keystone Exam Prep at 15.5 against MathMemoAR's 18.6. On price, ads, in-app purchases and device support there is nothing between them.

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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Keystone Exam Prep sells 10 one-off in-app purchases and MathMemoAR sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

Scorecard1 real difference · 8 level
Keystone Exam Prep versus MathMemoAR: the parameters behind the verdict, then further details
ParameterKeystone Exam PrepMathMemoAR
PriceFreeFree
Rating2.0 (1 ratings) — better—
Number of ratings1 — better—
Update frequencyEvery 7 months—
AdsNoNo
In-app purchasesYesYes
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPod — betteriPhone, iPad
Requires iOS15.5 — better18.6
Further details — not scored
Size145 MB12 MB
Age rating4+4+
DeveloperOnline LearningFrank Otto

In-app purchases

10 purchases

Keystone Exam Prep

One-time10
  • Package - 18900$199.99
  • Package - 19900$199.99
  • Package - 21900$199.99
Show 7 more
  • Package - 27900$299.99
  • Package - 39900$399.99
  • Package - 44900$449.99
  • Package - 54900$499.99
  • Package - 69900$699.99
  • Package - 79900$799.99
  • Package - 89900$899.99
1 purchases

MathMemoAR

One-time1
  • Premium - All Formulas$2.99

Questions

Is Keystone Exam Prep free?
Keystone Exam Prep is free to download, with in-app purchases available.
Is MathMemoAR free?
MathMemoAR is free to download, with in-app purchases available.
Do Keystone Exam Prep or MathMemoAR have ads?
Neither Keystone Exam Prep nor MathMemoAR shows ads.

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