MathGrid 100

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.