Comparison

シンプルFLASH暗算 vs MathGrid 100

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

Head to head
About

シンプルFLASH暗算

Features
Read full description

『シンプルFLASH暗算』は、画面に一瞬ずつ表示される数字を合計して答えるトレーニングアプリです。暗算力・注意力・ワーキングメモリの向上に役立ちます。UIはスマホ縦型に最適化。学習や脳トレ、受験対策にも。 ◆ 特長 ・一桁/二桁/三桁の難易度に対応 ・ステージモードで検定試験対策 ・表示口数(最大10口)/表示時間/消灯時間を自由に調整 ・効果音ON/OFF、ダーク/ライトのテーマ切替 ・ヒント表示で直前の出題を確認可能 ・オフラインでサクサク動作、すぐ再挑戦できるシンプル設計 ◆ 使い方 1. 「スタート」をタップして数字を順番に確認 2. 表示が終わったら合計を入力して「判定」 3. 正解・不正解が大きく表示され、ヒントで出題の内訳も確認できます ◆ こんな人におすすめ ・暗算を速く・正確にしたい ・通勤通学のスキマ時間に脳トレしたい ・受験・資格の計算力を底上げしたい ◆ プライバシー ・アカウント登録不要、個人情報の収集はありません ・設定は端末内に保存されます

About

MathGrid 100

Features
Read full description

MathGrid 100 — Photo-graded math drills for daily mental math practice. Known in Japan as "Hyakumasu Keisan" (百マス計算 / 100-square calculation), this classic drill is a proven method for building mental math fluency, recommended by Japanese educators such as Hideo Kageyama. MathGrid 100 brings this method to your iPhone with AI-powered photo grading: just snap a picture of the completed worksheet and get an instant score. 【Features】 * Camera-based instant grading — no typing required * Supports addition and multiplication * 9×9 (multiplication) and 10×10 grids * Review and manually edit each cell if needed * Saves up to 20 sessions in history * Points, levels, and badges to keep kids motivated * Daily streak tracking * Up to 4 separate child profiles with individual progress 【Great for】 * Parents tired of manually grading drill sheets * Tracking your child's daily practice * Gamifying repetitive practice to keep kids engaged * Supplementing Kumon, abacus class, or other math curricula ※ Internet connection required (handwriting recognition runs in the cloud). ※ This app shows a persistent banner ad and an interstitial ad after every few gradings.

Screenshots

シンプルFLASH暗算3 screens
MathGrid 1004 screens

Verdict

The call

シンプルFLASH暗算 and MathGrid 100 are too close to call on the numbers: across 6 compared parameters — price, update cadence, ads and in-app purchases 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

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

UpkeepUpdate frequency

シンプルFLASH暗算 ships an update fortnightly, MathGrid 100 every 3 weeks. The most recent releases landed on September 14, 2026 and September 19, 2026 respectively.

ScorecardNo meaningful differences
シンプルFLASH暗算 versus MathGrid 100: the parameters behind the verdict, then further details
ParameterシンプルFLASH暗算MathGrid 100
PriceFreeFree
Update frequencyFortnightly — betterEvery 3 weeks
AdsYesYes
In-app purchasesNoNo
DevicesiPhone, iPad, iPod — betteriPhone, iPod
Requires iOS15.615.1 — better
Further details — not scored
Size4 MB40 MB
Age rating4+4+
DeveloperTSUKASA YONAHAHiroyuki Ishikawa

In-app purchases

None

シンプルFLASH暗算

No in-app purchases

None

MathGrid 100

No in-app purchases

Questions

Is シンプルFLASH暗算 free?
シンプルFLASH暗算 is free to download, with no in-app purchases.
Is MathGrid 100 free?
MathGrid 100 is free to download, with no in-app purchases.
Do シンプルFLASH暗算 or MathGrid 100 have ads?
Both シンプルFLASH暗算 and MathGrid 100 show ads.
Which is updated more often, シンプルFLASH暗算 or MathGrid 100?
シンプルFLASH暗算 ships an update fortnightly, and MathGrid 100 every 3 weeks. Most recently, シンプルFLASH暗算 was updated on September 14, 2026 and MathGrid 100 on September 19, 2026.

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