Comparison

Crazy Maths. vs Even or odd Mental calculation

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

Head to head
About

Crazy Maths.

This app offers a fun way to learn and practice fundamental math skills. It covers addition, subtraction, multiplication, division, and number theory concepts through engaging exercises and game modes. Designed for self-improvement, it helps build arithmetic fluency and mental math strategies.

Highlights
  • Basic arithmetic practice
  • Number theory concepts
  • Multiplication table learning
  • Mental math strategies
  • Multiple difficulty levels
  • High scores and awards
  • Fun animations
Features
Read full description

Exploring a variety of mathematical topics. Learn basic math skills in addition, subtraction, multiplication and division. Learn the even numbers, odd numbers, prime numbers, Fibonacci numbers. Learn multiplication table. Exploring math skills. Improves arithmetic fluency and promotes development of mental strategies for addition, subtraction, multiplication, division and mixed operations. With a focus on self-improvement. FEATURES / EDUCATIONAL CONTENT: - Addition - Subtraction - Multiplication - Division - Arithmetic - Multiplication table - The even numbers, odd numbers, prime numbers, Fibonacci numbers. - Combination of the above - Practice mental addition, subtraction, multiplication, division and mixed operations - Develop arithmetic fluency and improve mental strategies - Mental math game - Choose their options by themselves - Various fun game modes - Possibility to follow the results of several players - 3 levels of difficulty - Fun animations - Access to the Game Center - High scores and awards. We are listening to, frequently enhancements game based on your feedback Please give us feedback in comments, we will make it the best game! .

About

Even or odd Mental calculation

Test your mental math skills by quickly determining if the result of an on-screen operation is even or odd. Earn more points for faster answers and challenge friends to see who has the quickest mind. The difficulty increases as you progress.

Highlights
  • Timed mental calculation challenges
  • Score tracking for personal bests
  • Speed-based scoring system
  • Increasing difficulty levels
  • Multiplayer comparison
Features
Read full description

Solve the calculation and choose: is the answer even or odd? Par o Impar combines addition, subtraction and multiplication with short sessions and two large answer buttons. Practise at your own pace or test your speed across five modes: - Classic: answer before time runs out and try to beat your record. - Sprint 60: get as many answers right as you can in one minute. Each mistake costs three seconds. - Daily Challenge: 20 calculations each day, with one official attempt and unlimited practice afterwards. - Training: choose addition, subtraction, multiplication or a mix. Play without a timer and see an explanation after each answer. - Challenge Route: complete 30 levels involving calculations, accuracy and memory, and earn medals. A short tutorial explains the controls. Pause your game, adjust sound and vibration, and check your records. Progress is saved on this device and all game modes work offline. The game interface is in Spanish. The app contains advertising. If you previously bought ad removal on iOS, you can restore it from Settings (Ajustes).

Screenshots

Crazy Maths.4 screens
Even or odd Mental calculation4 screens

Verdict

The call

The clearest difference is in-app purchases: Crazy Maths. at none against Even or odd Mental calculation's 1. Crazy Maths. also leads on ads (none vs shown) and iOS requirement (12.0 vs 15.0). Even or odd Mental calculation's advantage is update cadence (every 23 months vs every 64 months). On price 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. Even or odd Mental calculation sells 1 one-off in-app purchase. Crazy Maths. asks for nothing beyond the download.

UpkeepUpdate frequency

Crazy Maths. ships an update every 64 months, Even or odd Mental calculation every 23 months. The most recent releases landed on October 6, 2026 and October 3, 2026 respectively.

Scorecard5 real differences · 5 level
Crazy Maths. versus Even or odd Mental calculation: the parameters behind the verdict, then further details
ParameterCrazy Maths.Even or odd Mental calculation
PriceFreeFree
Rating5.0 (2 ratings) — better—
Positive reviews—100.0% of reviews
Number of ratings2 — better—
Update frequencyEvery 64 monthsEvery 23 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 — better15.0
Further details — not scored
Size26 MB68 MB
Age rating4+4+
DeveloperFernando Gonzalez FriasIker Vazquez

Customer experience

Crazy Maths.

All ratings2 ratings
Positive100.0%
Neutral0.0%
Negative0.0%

Even or odd Mental calculation

Written reviews5 reviews
Positive100.0%
Neutral0.0%
Negative0.0%

In-app purchases

None

Crazy Maths.

No in-app purchases

1 purchases

Even or odd Mental calculation

One-time1
  • Full version upgrade$0.99

Questions

Is Crazy Maths. free?
Crazy Maths. is free to download, with no in-app purchases.
Is Even or odd Mental calculation free?
Even or odd Mental calculation is free to download, with in-app purchases available.
Do Crazy Maths. or Even or odd Mental calculation have ads?
Even or odd Mental calculation shows ads; Crazy Maths. does not.
Which is updated more often, Crazy Maths. or Even or odd Mental calculation?
Crazy Maths. ships an update every 64 months, and Even or odd Mental calculation every 23 months. Most recently, Crazy Maths. was updated on October 6, 2026 and Even or odd Mental calculation on October 3, 2026.

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