# Subtraction Memorizer

> Memorize the most important subtraction facts!

Canonical page: [https://chrome-stats.com/d/com.mathdomaindevelopment.subtractionmemorizer](https://chrome-stats.com/d/com.mathdomaindevelopment.subtractionmemorizer)

## Overview

- **ID:** `com.mathdomaindevelopment.subtractionmemorizer`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** MATH Domain Development
- **Category:** EDUCATION
- **Downloads:** 25,341
- **Rating:** 4.64 / 5 (91 ratings)
- **Version:** 1.0.18
- **Last updated:** 2025-09-02
- **First published:** 2015-10-04
- **Publisher country:** US
- **Size:** 5.39 MB
- **Data as of:** 2026-09-09
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.mathdomaindevelopment.subtractionmemorizer)
- **Website:** [https://mathdomaindevelopment.blogspot.com/](https://mathdomaindevelopment.blogspot.com/)
- **Privacy policy:** [https://mathdomaindevelopment.blogspot.com/2020/12/privacy-memorizer-apps.html](https://mathdomaindevelopment.blogspot.com/2020/12/privacy-memorizer-apps.html)

## Description

**Subtraction Memorizer** is a comprehensive Chrome extension designed to help learners master essential subtraction tables through interactive and engaging methods. Featuring stress-free subtraction tables, it allows users to view problems and answers comfortably without pressure.

The extension includes a Practice mode with randomized questions to enhance accuracy, a Time Trials mode to test and improve speed, and a Data dashboard showcasing detailed progress statistics. It tracks best times and overall improvements, encouraging goal-setting and friendly competition. The user-friendly interface supports gradual learning while keeping records to motivate continuous improvement. This ad-supported, free app is an ideal tool for students, educators, and anyone looking to sharpen their subtraction skills.

## Rankings

- #394,443 — Overall

## Permissions and access

### Permissions

- `android.permission.ACCESS_ADSERVICES_AD_ID`
- `android.permission.ACCESS_ADSERVICES_ATTRIBUTION`
- `android.permission.ACCESS_ADSERVICES_TOPICS`
- `android.permission.ACCESS_NETWORK_STATE`
- `android.permission.FOREGROUND_SERVICE`
- `android.permission.INTERNET`
- `android.permission.VIBRATE`
- `android.permission.WAKE_LOCK`
- `com.mathdomaindevelopment.subtractionmemorizer.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Subtraction Memorizer is praised for its simplicity, effectiveness, and suitability for learners of all ages, including children with special needs. Users appreciate its focus on improving subtraction skills and tracking progress. However, common issues include the inability to reset data to start fresh, limited problem difficulty without three-digit subtraction, and intrusive ads without a paid ad-free option.

### Pros

- Helpful for math students of all ages and skill levels
- Simple, easy to use, and ideal for focused learning without distractions
- Effective for improving subtraction skills and tracking progress
- Suitable for children, including those with special needs like autism, due to lack of animations and sounds
- Educational and smart tool for practicing subtraction

### Cons

- No option to reset or delete existing data for starting over
- Limited subtraction range; lacks support for 3-digit subtraction problems
- Presence of irritating ads with no paid ad-free version available

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.mathdomaindevelopment.subtractionmemorizer)