Comparison

글씨21 vs Mental Math Games

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

Head to head
About

글씨21

Features
Read full description

'글씨'라는 매개를 통해 고전과 현대예술의 조화를 꿈꾸는 영상매거진 '글씨21'이 문을 열었습니다. '글씨21'은 서예와 문인화 그리고 캘리그라피와 전각의 모든 것을 담고 있습니다. 최신 공모전, 전시 프리뷰와 리뷰, 칼럼과 강좌 및 작가와의 인터뷰 등을 하나의 애플리케이션을 통해 실시간으로 만나실 수 있습니다. 예술의 자유로움을 담아낼 수 있는 새로운 형식의 모바일 매거진 '글씨21'은 기존의 잡지에서는 느낄 수 없었던 속도와 생생한 현장감을 영상으로 보실 수 있습니다.

About

Mental Math Games

Features
Read full description

Bopoom Math turns arithmetic practice into a short, noisy, happy game. Every right answer adds to the streak, and the longer the streak, the bigger the fireworks and the fuller the music. Bopoom, a little popcorn, cheers from the corner. WHAT CHILDREN PRACTISE • 61 skills, from "make 10" to "solve for x" • Addition and subtraction, with and without regrouping • Times tables and division facts • Column addition, subtraction, multiplication and long division, entered digit by digit • Decimals, fractions, percent, ratios, order of operations MATCHED TO SCHOOL • Skills are sorted into grades the way your country teaches them: United States, United Kingdom, Canada, Australia, Germany, France, Spain, Japan, Korea, mainland China, Taiwan and Hong Kong • Local grade names (Year 3, CE2, 3. Klasse…), local signs for multiply and divide, local decimal mark • Eight languages: English, 简体中文, 繁體中文, 日本語, 한국어, Deutsch, Français, Español WHY THEY COME BACK • Rounds last a couple of minutes, so "one more" is easy • A skill tree that fills with stars and opens the next skill when a child is ready • My Level picks problems at the right difficulty by itself • Daily quests, a calendar that stamps every day played, capsule prizes to collect, and more than a hundred trophies • Game Center leaderboards and achievements • A daily reminder, a Home Screen widget with the streak, and a result to share as a picture or a short video MADE FOR FAMILIES • No ads and no account. Progress is kept on the device and in your own iCloud • Sound, music and screen effects each have their own setting, down to completely calm • Mistakes are shown with the working, never punished Playing needs the full version: every grade and every skill, by the month or with a single purchase that never expires. Terms of Use: https://bopoom.com/terms Privacy Policy: https://bopoom.com/privacy

Screenshots

글씨214 screens
Mental Math Games4 screens

Verdict

The call

The clearest difference is in-app purchases: 글씨21 at none against Mental Math Games's 2. 글씨21 also leads on iOS requirement (11.0 vs 16.0). On price, update cadence, ads 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. Mental Math Games sells 2 in-app purchases, starting at $1.99 per month. 글씨21 asks for nothing beyond the download.

UpkeepUpdate frequency

글씨21 ships an update every 11 days, Mental Math Games weekly. The most recent releases landed on October 29, 2026 and October 26, 2026 respectively.

Scorecard2 real differences · 4 level
글씨21 versus Mental Math Games: the parameters behind the verdict, then further details
Parameter글씨21Mental Math Games
PriceFreeFree
Update frequencyEvery 11 daysWeekly — better
AdsNoNo
In-app purchasesNo — betterYes
DevicesiPhone, iPod — betteriPhone
Requires iOS11.0 — better16.0
Further details — not scored
Size4 MB17 MB
Age rating4+4+
DeveloperTAEJIN SEOK绍宝 叶

In-app purchases

None

글씨21

No in-app purchases

2 purchases

Mental Math Games

Subscriptions1
  • Full Version Monthly$1.991 Month
One-time1
  • Full Version$9.99

Questions

Is 글씨21 free?
글씨21 is free to download, with no in-app purchases.
Is Mental Math Games free?
Mental Math Games is free to download, with in-app purchases available.
Do 글씨21 or Mental Math Games have ads?
Neither 글씨21 nor Mental Math Games shows ads.
Which is updated more often, 글씨21 or Mental Math Games?
글씨21 ships an update every 11 days, and Mental Math Games weekly. Most recently, 글씨21 was updated on October 29, 2026 and Mental Math Games on October 26, 2026.

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