# Mental Calculation FLASH ANZAN

> Don't think. FEEL!!!

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

## Overview

- **ID:** `com.ymkwt.android.mentalcalculation`
- **Platform:** Android
- **Type:** Android app
- **Status:** Available
- **Publisher:** ymkwt
- **Category:** EDUCATION
- **Downloads:** 179,175
- **Rating:** 4.43 / 5 (564 ratings)
- **Version:** 3.0.3
- **Last updated:** 2021-08-26
- **First published:** 2011-06-06
- **Publisher country:** JP
- **Data as of:** 2026-09-09
- **Store listing:** [Google Play Store](https://play.google.com/store/apps/details?id=com.ymkwt.android.mentalcalculation)
- **Website:** [https://namaekukan.com/](https://namaekukan.com/)
- **Privacy policy:** [https://namaekukan.com/privacy/?id=mentalcalculation](https://namaekukan.com/privacy/?id=mentalcalculation)

## Description

**Mental Calculation FLASH ANZAN** is a Japanese right brain training Chrome extension designed to boost your mental arithmetic skills. By adding numbers that appear in rapid succession, users train their speed and accuracy, aiming to perform hundreds of calculations per minute.

Key features include adjustable speed settings (from 4.0 to 0.15 seconds), customizable digits (1-5), and flexible calculation rounds (5-100). The extension supports negative numbers, fixed digits options, and tracks your correct answer percentages for progress monitoring. If you face difficulties, remember: "Don't think. FEEL!" – inspired by Bruce Lee. This tool is perfect for anyone wanting to improve their mental math quickly and effectively.

## Rankings

- #167,701 — Overall

## Review summary

Users appreciate the app as a great tool for UCMAS and abacus mental calculation training, praising its usability and effectiveness in improving speed and concentration. However, multiple users expressed dissatisfaction with the recent update that limits digits to 100, makes speed settings harder to access, removes screen rotation, and causes input issues when entering zero in certain modes.

### Pros

- Great for UCMAS and abacus students to practice mental calculation.
- App is very useful and perfect for mental math training.
- Easy to use and helps improve calculation speed.
- Unique and one of the best calculation training apps available.
- Helps in concentrating and improving math skills.

### Cons

- Recent update reduced digit limit to 100, frustrating users.
- Speed control settings moved to a confusing location in settings, less accessible than before.
- Screen rotation feature removed, limiting usability.
- Cannot enter 0 as an answer in 'enable negative number' mode, causing input issues.

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