Flash Mental Calc vs けいさん道場
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Flash Mental Calc
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Boost your mental math skills with Flash Mental Calculation! A simple and effective training app where numbers flash on screen and you calculate the sum as fast as you can. 【Features】 · Addition, Subtraction & Mixed mode · Customizable difficulty (digits, count, speed) · Sound & haptic feedback · Japanese / English / Chinese 【Premium - one-time】 · Mixed mode (addition + subtraction) · Unlimited custom difficulty · Accuracy charts & statistics
けいさん道場
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四則演算の計算力を鍛えるトレーニングアプリです。 4段階の難易度（かんたん〜超級）で、10問の計算問題に4択で挑戦。正答率やタイムを記録して上達を実感できます。 ■ 主な機能 ・四則演算（足し算・引き算・掛け算・割り算） ・4段階の難易度 ・4択回答形式 ・成績記録・履歴管理 ■ 安心設計 ・完全オフライン動作 ・広告なし ・データは端末内のみに保存
Screenshots
Verdict
Flash Mental Calc and けいさん道場 are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.
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.
| Parameter | Flash Mental Calc | けいさん道場 |
|---|---|---|
| Price | Free | Free |
| Update frequency | — | Every 10 days |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad | iPhone, iPad |
| Requires iOS | 17.0 | 17.0 |
| Further details — not scored | ||
| Size | 5 MB | 9 MB |
| Age rating | 4+ | 4+ |
| Developer | Wenbo Chen | SANWA Inc. |
In-app purchases
Flash Mental Calc
No in-app purchases
けいさん道場
No in-app purchases
