Comparison

Cal & Bomba vs World Flags Challenges

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

Head to head
About

Cal & Bomba

Features
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Join the pyromaniac gnome Cal and the troll Bomba on an explosive math adventure, in this award winning game. They travel through different worlds with their cannon. You must use percentage calculations to change the range of the cannon. Cal & Bomba are designed by the Norwegian game development company Filiokus, and the goal is for you to experience how mathematical choices have practical consequences, and hopefully for you to have some fun while doing math. Mathematics in the game The game introduces the player to two important mathematical aspects: strategy - what should I do and why? And calculation - how should I apply mathematical theory to execute the desired strategy? The strategy part of the game has many parallels to chess. You will encounter challenges where you need to foresee 1-2 moves ahead and make strategic choices that enhance the effectiveness of your bombs. The calculation part of the game aims to provide insight into how percentage calculations work. If the cannon's range is 4 and you want to shoot something that is at 6, you need to figure out by how much 4 must increase in percentage for the result to be 6. (In this example, we would recommend increasing the range by 50%). Visual mathematics When you increase or decrease the range through percentage calculations, it will result in a change both in the number representing the range and in the visual range indicator. We believe that when mathematical theory gains a visual dimension to express itself, it becomes easier to understand the meanings of different numbers and functions, and over time, users develop pattern recognition skills that can be transferred to regular math education. Learn from your mistakes Making mistakes is an important part of the learning process. If you make mistakes in the game, you will have the opportunity to experience the consequences of those mistakes. The game will play out your mathematical choices, whether they are good or bad, and you decide if you are satisfied with the outcome. We strongly believe that mathematical logic becomes easier to understand when you are allowed to play with it and experience the consequences of the choices you make. Mathematics is a problem-solving tool In reality, people rarely use mathematics just for the sake of it. Math is used as a tool to solve a problem. However, in regular math education, it is often the case that mathematics itself is the only application of mathematics, and many find it difficult to see why they will need this knowledge later on. In Cal & Bomba, you don't calculate for the sake of calculating. Your goal is to shoot all the enemies on the board. Percentage calculation is a tool you need to use to achieve this goal, and it must be combined with other game mechanics to achieve the desired result. Happy hunting.

About

World Flags Challenges

Features
Read full description

Challenge your knowledge of flags from around the world with Guess the Country: Flag Quiz! This engaging and educational game offers two modes: Multiple Choice Quiz and Written Mode. As you progress, the difficulty increases, keeping you entertained and learning. Track your high score and compete with friends. Perfect for geography enthusiasts and learners of all ages. Available in English, Spanish, and Portuguese. Download now and put your flag knowledge to the test!

Screenshots

Cal & Bomba4 screens
World Flags Challenges2 screens

Verdict

The call

The clearest difference is in-app purchases: World Flags Challenges at none against Cal & Bomba's 1. World Flags Challenges also leads on update cadence (every 2 days vs every 3 months). Cal & Bomba's advantage is ads (none vs shown). On price, device support and iOS requirement there is nothing between them.

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

CostPrice ยท In-app purchases ยท Ads ยท Monetization

Both are free to download. Cal & Bomba sells 1 one-off in-app purchase. World Flags Challenges asks for nothing beyond the download.

UpkeepUpdate frequency

Cal & Bomba ships an update every 3 months, World Flags Challenges every 2 days. Both last shipped on October 27, 2026.

Scorecard3 real differences ยท 3 level
Cal & Bomba versus World Flags Challenges: the parameters behind the verdict, then further details
ParameterCal & BombaWorld Flags Challenges
PriceFreeFree
Update frequencyEvery 3 monthsEvery 2 days โ€” better
AdsNo โ€” betterYes
In-app purchasesYesNo โ€” better
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS12.0 โ€” better13.0
Further details โ€” not scored
Size326 MB25 MB
Age rating9+4+
DeveloperFiliokus asVinicius Fortes

In-app purchases

1 purchases

Cal & Bomba

One-time1
  • Unlock Full Version$7.99
None

World Flags Challenges

No in-app purchases

Questions

Is Cal & Bomba free?
Cal & Bomba is free to download, with in-app purchases available.
Is World Flags Challenges free?
World Flags Challenges is free to download, with no in-app purchases.
Do Cal & Bomba or World Flags Challenges have ads?
World Flags Challenges shows ads; Cal & Bomba does not.
Which is updated more often, Cal & Bomba or World Flags Challenges?
Cal & Bomba ships an update every 3 months, and World Flags Challenges every 2 days. Most recently, Cal & Bomba was updated on October 27, 2026 and World Flags Challenges on October 27, 2026.

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