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.
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.
- Timed mental calculation challenges
- Score tracking for personal bests
- Speed-based scoring system
- Increasing difficulty levels
- Multiplayer comparison
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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).
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.
- Fraction representation
- Addition and subtraction of fractions
- Equivalent fractions
- Fraction reduction
- Multiplication and division of fractions
- Multiplayer mode
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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
Verdict
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
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.
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.
| Parameter | Even or odd Mental calculation | Fraction Challenge |
|---|---|---|
| Price | Free | Free |
| Rating | — | 4.5 (1.5K ratings) — better |
| Positive reviews | 100.0% of reviews — better | 70.1% of reviews |
| Number of ratings | — | 1.5K — better |
| Update frequency | Every 23 months | Every 2 months — better |
| Ads | Yes | No — better |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 13.0 — better |
| Further details — not scored | ||
| Size | 68 MB | 89 MB |
| Age rating | 4+ | 4+ |
| Developer | Iker Vazquez | Didactoons Games SL |
Customer experience
Even or odd Mental calculation
Fraction Challenge
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
Even or odd Mental calculation
- Full version upgrade$0.99
Fraction Challenge
- Get the Full version$1.99
Questions
Is Even or odd Mental calculation free?
Is Fraction Challenge free?
Do Even or odd Mental calculation or Fraction Challenge have ads?
Which is updated more often, Even or odd Mental calculation or Fraction Challenge?
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