Mental Math vs おかね脳トレ
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Mental Math
Train your calculation skills with this app by solving math problems against the clock. Customize the time limit and number of questions for a personalized challenge. Review your results to track progress and improve your math abilities.
- Solve math problems against a time limit
- Customize time limit and number of problems
- Review calculation results
- Simple and comfortable user interface
- Gaming experience for spare time
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This is a calculation training app where you can solve math problems within a predetermined time limit. You can customize the time limit and the number of problems according to your preferences. Once the problems are completed, the calculation results are displayed, and you can make use of them in the future. The problem interface has been designed to be as simple as possible, ensuring comfortable usability. With a short time limit, you can play and solve problems in your spare time, enjoying a gaming experience. If you have any requests or suggestions, you can submit them through the app. Please feel free to actively utilize it if there are any features you desire.
おかね脳トレ
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年金の手取り、医療費の自己負担、買い物のおつり。暮らしに出てくるお金の数字だけで、1日10問の計算練習ができます。 ■ できること ・1日10問。3分ほどで終わります ・問題は21種類(おつり、割引、消費税、年金の手取り、年金の繰下げ、医療費の窓口負担、医療費控除、貯金がもつ期間 など) ・1問ごとに、正解と計算のしかたをその場で表示 ・つづけた日数、今月やった日、正答率を記録 ・途中でやめても、その日のうちは続きから ・むずかしさを3段階から選べます ・文字の大きさを3段階から選べます ・毎日のお知らせ(希望する方のみ) ■ Pro(買い切り) ・広告なし ・1問ごとに、ひとことの解説と出典を表示 ・まちがえた問題を、数字を変えてやり直し ・おかわり10もん(別の問題を何度でも) ・種類をえらんで練習 ・種類べつの成績と、2週間のグラフ 月額の支払いはありません。一度のお支払いでずっと使えます。 ■ 問題に出てくる制度の数字 日本年金機構、国税庁、厚生労働省、総務省の公表資料で確かめた数字を使っています(令和8年度)。 ※ このアプリは計算の練習をするものです。表示する金額は一例で、実際の金額は制度や自治体によって異なります。
Screenshots
Verdict
The clearest difference is in-app purchases: Mental Math at none against おかね脳トレ's 1. Mental Math also leads on iOS requirement (13.0 vs 16.4). 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
Both are free to download. おかね脳トレ sells 1 one-off in-app purchase. Mental Math asks for nothing beyond the download.
Mental Math ships an update every 6 days, おかね脳トレ every 9 days. The most recent releases landed on October 15, 2026 and October 25, 2026 respectively.
| Parameter | Mental Math | おかね脳トレ |
|---|---|---|
| Price | Free | Free |
| Rating | 4.5 (4 ratings) — better | — |
| Positive reviews | 75.0% of reviews | — |
| Number of ratings | 4 — better | — |
| Update frequency | Every 6 days — better | Every 9 days |
| Ads | Yes | Yes |
| In-app purchases | No — better | Yes |
| Monetization | Ad-supported | — |
| Devices | iPhone, iPod — better | iPhone |
| Requires iOS | 13.0 — better | 16.4 |
| Further details — not scored | ||
| Size | 67 MB | 40 MB |
| Age rating | 4+ | 4+ |
| Developer | Yudai Kitano | KODAI MURAKAMI |
In-app purchases
Mental Math
No in-app purchases
おかね脳トレ
- Pro(広告なし・全機能)$3.99
Questions
Is Mental Math free?
Is おかね脳トレ free?
Do Mental Math or おかね脳トレ have ads?
Which is updated more often, Mental Math or おかね脳トレ?
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