# Abacus Lesson

> Change your life with abacus!

Canonical page: [https://chrome-stats.com/d/id1596053232](https://chrome-stats.com/d/id1596053232)

## Overview

- **ID:** `id1596053232`
- **Platform:** Apple
- **Type:** Apple app
- **Status:** Available
- **Publisher:** Hirokazu Komatsu
- **Category:** Education
- **Rating:** 4.80 / 5 (95 ratings)
- **Version:** 1.1.5
- **Last updated:** 2023-09-10
- **First published:** 2021-12-19
- **Size:** 153 MB
- **Data as of:** 2026-09-19
- **Store listing:** [Apple App Store](https://apps.apple.com/us/app/abacus-lesson/id1596053232)
- **Website:** [https://hirokuma.blog](https://hirokuma.blog/)
- **Privacy policy:** [https://hirokuma.blog/?p=4450](https://hirokuma.blog/?p=4450)

## Description

Abacus Lesson is a Chrome extension that teaches abacus skills and rapid mental arithmetic, challenging you to solve problems in about 5 seconds. It offers ad-free lessons, portrait or landscape layouts, and freely movable abacus and window positions, plus training focused on finger movements and quick mental calculation to boost learning efficiency.

Lessons come from a highly-rated series and have been refined for clarity. New features include sound variations with adjustable volume, freely selectable colors, and a trophy reward for reaching goals, all optimized for smoother operation.

## Rankings

- #136,030 — Overall

## Review summary

Abacus Lesson is praised for being fun, engaging, and effective at teaching soroban basics through structured, progressive lessons. Users appreciate learning all core operations and the move from physical to mental math, with good value for the paid upgrade. Common downsides center on copy quality (typos and rough translation) and the need for clearer finger-movement guidance. Some also report purchasing/support friction, suggesting room for improved localization and customer support.

### Pros

- Fun, engaging learning experience that makes practicing abacus enjoyable.
- Structured, progressive lessons that gradually build skills.
- Clear instruction on correct soroban finger movements and transitioning to mental math.
- Covers addition, subtraction, multiplication, and division comprehensively.
- Good value; the paid upgrade is worth it.

### Cons

- Copy quality issues, including typos and rough, less clear translation.
- Finger-technique instructions could be clearer with better visuals and guidance.

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Source: [Chrome-Stats](https://chrome-stats.com/d/id1596053232)