Comparison

Even or odd Mental calculation vs Fraction Challenge

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

Head to head
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).

About

Fraction Challenge

Engage in fun math games designed to teach and reinforce fraction operations. Practice addition, subtraction, multiplication, and division of fractions through interactive challenges. Compete with friends in multiplayer mode to boost mental calculation skills.

Highlights
  • Fraction representation
  • Addition and subtraction of fractions
  • Equivalent fractions
  • Fraction reduction
  • Multiplication and division of fractions
  • Multiplayer mode
Features
Read full description

Learn to do operations with fractions with this fun app. Here you will find a lot of educational games of mental calculation to learn and reinforce mathematical concepts, such as the representation of fractions, addition and subtraction with the same and different denominator, multiplication and division of fractions, equivalent fractions and reduction of fractional numbers. ENJOY THE MULTIPLAYER MODE! With this educational game you can play alone or in company, as it features a multiplayer mode. Challenge your classmate and become the fastest one in arithmetics, solving the different mathematical activities. BECOME THE KING OR QUEEN OF ARITHMETICS AND MENTAL CALCULATION! With just a few minutes a day you can improve your math level and beat your own records. THE IMPORTANCE OF FRACTIONS IN OUR DAILY ROUTINE Fractions are not only used as a concept in the subject of mathematics for children; they are necessary in order to perform various actions of daily life. For example: when buying food, it is normal to go to the supermarket and order ½ kilogram of apples. Measuring ingredients in the kitchen, buying fabrics or many other everyday things are solved with fractional numbers. EDUCATIONAL GOALS - Representation of fractions. - Addition and subtraction of fractions with a common denominator. - Equivalent fractions. - Fraction reduction. - Multiplying and dividing fractional numbers COMPANY: Didactoons Games SL Recommended age: For primary and secondary school children, 7 to 16 years old. Theme: Multiplayer game to learn arithmetic and mental calculation. CONTACT We want to know your opinion! Please share with your questions, technical problems, suggestions and everything you want with us. Write to us via our contact form: https://www.didactoons.com/contact/

Screenshots

Even or odd Mental calculation4 screens
Fraction Challenge4 screens

Verdict

The call

The clearest difference is ads: Fraction Challenge at none against Even or odd Mental calculation's shown. Fraction Challenge also leads on update cadence (every 2 months vs every 23 months) and iOS requirement (13.0 vs 15.0). Even or odd Mental calculation's advantage is review sentiment (100% vs 70%). On price, in-app purchases, monetization model 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 and Fraction Challenge sells 1 one-off in-app purchase. Whichever you choose, the download price is not the number that matters.

UpkeepUpdate frequency

Even or odd Mental calculation ships an update every 23 months, Fraction Challenge every 2 months. The most recent releases landed on November 1, 2026 and November 7, 2026 respectively.

Scorecard4 real differences · 6 level
Even or odd Mental calculation versus Fraction Challenge: the parameters behind the verdict, then further details
ParameterEven or odd Mental calculationFraction Challenge
PriceFreeFree
Rating—4.5 (1.5K ratings) — better
Positive reviews100.0% of reviews — better70.1% of reviews
Number of ratings—1.5K — better
Update frequencyEvery 23 monthsEvery 2 months — better
AdsYesNo — better
In-app purchasesYesYes
MonetizationFree with in-app purchasesFree with in-app purchases
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS15.013.0 — better
Further details — not scored
Size68 MB89 MB
Age rating4+4+
DeveloperIker VazquezDidactoons Games SL

Customer experience

Even or odd Mental calculation

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

Fraction Challenge

All ratings1,491 ratings
Positive88.1%
Neutral4.7%
Negative7.2%
Written reviews67 reviews
Positive70.1%
Neutral6.0%
Negative23.9%

Bugs and requests

Even or odd Mental calculation

Not enough reviews yet to summarise bugs or requests.

Fraction Challenge

Reported bugs

2 issues
  • App crashes on launch
  • Login issues

Requested features

3 requests
  • Option to remove timer or increase time
  • More game modes (e.g., divided fractions, add/subtract fractions, multiply)
  • No battery required to play

In-app purchases

1 purchases

Even or odd Mental calculation

One-time1
  • Full version upgrade$0.99
1 purchases

Fraction Challenge

One-time1
  • Get the Full version$1.99

Questions

Is Even or odd Mental calculation free?
Even or odd Mental calculation is free to download, with in-app purchases available.
Is Fraction Challenge free?
Fraction Challenge is free to download, with in-app purchases available.
Do Even or odd Mental calculation or Fraction Challenge have ads?
Even or odd Mental calculation shows ads; Fraction Challenge does not.
Which is updated more often, Even or odd Mental calculation or Fraction Challenge?
Even or odd Mental calculation ships an update every 23 months, and Fraction Challenge every 2 months. Most recently, Even or odd Mental calculation was updated on November 1, 2026 and Fraction Challenge on November 7, 2026.

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