Mental arithmetic quiz vs 鼓己
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mental arithmetic quiz
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Results: Statistics and display of results based on different users (local user roles), the total number of practice questions + the number of correct questions + the number of errors + the number that will be completed in the future, as well as the stars you have obtained and the achievements you have achieved; Challenge: quick start; addition operation; subtraction operation; multiplication operation; division operation; endless challenge; Question Bank: (Question Bank Settings) Configure configuration settings for various calculations and customize quizzes that suit you;
鼓己
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鼓励自己: 首页: 每天对自己说一句话，记录每日体重 鼓舞墙: 弹幕式展示过往，当飘满屏的时候，你就成功啦～！！ 附带统计和体重标准，推荐食谱等 如果您在使用的过程中遇到问题，或者有更好的建议。 请联系我：chenyun008qq@gmail.com
Screenshots
Verdict
The clearest difference is update cadence: Mental arithmetic quiz at every 8 days against 鼓己's every 5 weeks. On price, ads, in-app purchases 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. Neither carries in-app purchases, so what you see is what you pay.
Mental arithmetic quiz ships an update every 8 days, 鼓己 every 5 weeks. The most recent releases landed on May 17, 2026 and September 18, 2026 respectively.
| Parameter | Mental arithmetic quiz | 鼓己 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Every 8 days — better | Every 5 weeks |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod — better | iPhone, iPod |
| Requires iOS | 12.1 | 11.0 — better |
| Further details — not scored | ||
| Size | 38 MB | 17 MB |
| Age rating | 4+ | 4+ |
| Developer | LiRen Sun | Yun Chen |
In-app purchases
Mental arithmetic quiz
No in-app purchases
鼓己
No in-app purchases
