# Mental Math - Train your Brain

> Improve your mental math skills by learning 30+ personalized tips totally free.

Canonical page: [https://chrome-stats.com/d/com.obsidiansoft.android.mentalmaths](https://chrome-stats.com/d/com.obsidiansoft.android.mentalmaths)

## Overview

- **ID:** `com.obsidiansoft.android.mentalmaths`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** ObsidianSoft
- **Category:** EDUCATION
- **Downloads:** 11,070
- **Rating:** 3.80 / 5 (50 ratings)
- **Version:** 31.0.0
- **Last updated:** 2026-08-15
- **First published:** 2020-03-10
- **Publisher country:** PK
- **Size:** 46 MB
- **Data as of:** 2026-09-14
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.obsidiansoft.android.mentalmaths)
- **Website:** [https://obsidiansofteducation.com/](https://obsidiansofteducation.com/)
- **Privacy policy:** [https://obsidiansofteducation.blogspot.com/p/mental-math-privacy-policy.html](https://obsidiansofteducation.blogspot.com/p/mental-math-privacy-policy.html)

## Description

**Mental Math - Train Your Brain** is a free Chrome extension designed to improve your mental arithmetic skills effectively. In today's fast-paced world, quickly performing calculations without pen and paper is essential. This extension offers a personalized learning experience by first assessing your strengths and weaknesses through a diagnostic test. Based on your results, it crafts a unique training plan featuring over 30 mental math tips tailored specifically to your needs.

Each tip comes with practice questions that help you master various mental calculation strategies, enhancing speed and accuracy. Whether you're a student, professional, or anyone looking to sharpen your mental math, this tool is ideal for boosting your brainpower efficiently. Download now and watch your mental math skills flourish with consistent practice and expert guidance.

## Rankings

- #543,498 — 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.READ_EXTERNAL_STORAGE`
- `android.permission.WAKE_LOCK`
- `android.permission.WRITE_EXTERNAL_STORAGE`
- `com.android.vending.BILLING`
- `com.google.android.gms.permission.AD_ID`
- `com.obsidiansoft.android.mentalmaths.DYNAMIC_RECEIVER_NOT_EXPORTED_PERMISSION`

## Review summary

Users appreciate this app's effective mental math exercises, adjustable timers, and user-friendly design suitable for all ages. However, multiple reviewers note that the timer can be too tight on harder questions, and the inability to revisit earlier sections is a drawback. Input keys might be too small, and the lack of feedback on wrong answers reduces learning potential. Overall, while functional and engaging, improvements in timing flexibility, UI, and learning feedback would enhance the experience.

### Pros

- Effective for mental math practice with a good variety of exercises
- Configurable timer adds challenge and helps with brain training
- User-friendly interface with clear instructions and quality graphics
- Suitable for different age groups including children and adults
- Option to purchase the app to remove ads appreciated

### Cons

- Timer settings can be too strict, especially for harder problems, causing frustration
- Lack of ability to revisit or practice earlier sections after progressing
- Numeric keypad/button sizes could be larger or better spaced for easier input
- App does not provide correct answers after mistakes, limiting learning feedback
- Some UI elements could be improved for better user experience, including feedback sounds or visual cues on correct answers

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Source: [Chrome-Stats](https://chrome-stats.com/d/com.obsidiansoft.android.mentalmaths)