# Add & Subtract Master — Practice written calculation

> Practice written calculation (iPhone/iPad app by akira kawakami.)

- Source: https://appshunter.io/ios/app/add-and-subtract-master/id6775512584 (this page in markdown: same URL + `.md`)
- Developer: [akira kawakami](https://appshunter.io/developer/1893576295)
- Category: Education
- Price: $1.99
- Age rating: 4+
- Requires: iOS 26.0 · 15 MB
- Languages: American English
- Released: 2026-06-03
- Data updated: 2026-09-09
- User reviews in markdown: https://appshunter.io/ios/app/add-and-subtract-master/id6775512584/reviews.md

## What is Add & Subtract Master?

Add & Subtract Master is a focused iPhone and iPad practice app for elementary written addition and subtraction.

On iPhone, learners keep the full calculation visible while writing with a finger in one enlarged selected cell. On iPad, they can continue writing directly in the calculation cells with Apple Pencil or touch. The app checks the final answer while helping children align digits and build the flow of written calculation.

Handwriting is read as written, with a keypad available when recognition needs correction. Only digits corrected during review are stored on the device and used to tune recognition for it. Learning can be turned off, and saved corrections and the personal model can be reset at any time.

Missed questions return after a few more problems. Choose 5, 10, 15, or 20 minute sessions for home learning, tutoring, or daily practice.

One-time purchase. No ads or additional purchases.

Handwriting images, corrections, and the personal recognition model are processed and stored only on the device in use. Nothing is sent off-device.


## Version history (last 5 releases)

### 2.1.1 — 2026-08-24

Adjusted the app icon so it keeps the same appearance in Dark Mode as in Light Mode.

### 2.1.0 — 2026-08-18

This update adds iPhone support.

- Write with a finger in one enlarged cell while keeping the full calculation visible
- Next Cell moves through the answer from the ones place
- Review and correct recognized digits with the keypad
- Direct Apple Pencil input on iPad remains unchanged

Handwriting data never leaves the device.

### 2.0.0 — 2026-07-22

Handwriting recognition can now adapt to writing on this iPad.

- Learns only from digits corrected during review
- Turn learning off, view saved correction counts, or reset from Settings
- Added home-screen links to the other Written Calculation Master apps
- Updated the app icon

Handwriting data never leaves the device.

### 1.0.1 — 2026-06-15

Minor fixes. Added a gentle review prompt while learners get used to checking their handwritten digits.

### 1.0 — 2026-06-03

No release notes.

## More apps by akira kawakami

- [PTimer: Pomodoro Focus Timer](https://appshunter.io/ios/app/ptimer-pomodoro-focus-timer/id6762259538)
- [Prompter Never Lose Your Place](https://appshunter.io/ios/app/prompter-never-lose-your-place/id6762259685)
- [Long Division Master](https://appshunter.io/ios/app/long-division-master/id6767220587)
- [Written Multiplication Master](https://appshunter.io/ios/app/written-multiplication-master/id6771003502)
- [Phonoria](https://appshunter.io/ios/app/phonoria/id6771007670)

All apps by akira kawakami: https://appshunter.io/developer/1893576295

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*Data collected daily from the US App Store and indexed by [AppsHunter](https://appshunter.io/). User reviews are verbatim App Store reviews. Ratings, prices and chart positions refresh continuously; this snapshot is from 2026-09-09.*