Simple Soroban

Installs

1.3m

Rating

4.8

Rating count

10k

Category	Education
Developer	Bruno Takahashi Carvalhas de Oliveira
Price	Free
First release	8/8/2014 (11 years ago)
Version	2.1.4
In-app purchases	No
Contains ads	No
Content rating	Rated for 3+
Package name	br.net.btco.soroban

View on Play Store

Core Metrics

Data Breakdown

Date	Rating Count	Average Rating	Installs	Version
7/30/2025	9,988	4.840	1,292,531	2.1.4
7/29/2025	9,986	4.840	1,291,760	2.1.4
7/28/2025	9,985	4.840	1,291,123	2.1.4
7/27/2025	9,980	4.840	1,290,282	2.1.4
7/26/2025	9,979	4.840	1,289,459	2.1.4
7/25/2025	9,977	4.840	1,288,754	2.1.4
7/24/2025	9,973	4.840	1,287,996	2.1.4
7/23/2025	9,971	4.840	1,287,323	2.1.4
7/22/2025	9,970	4.840	1,286,450	2.1.4
7/21/2025	9,964	4.840	1,285,596	2.1.4
7/20/2025	9,961	4.840	1,284,877	2.1.4
7/19/2025	9,958	4.840	1,284,018	2.1.4
7/18/2025	9,956	4.840	1,283,120	2.1.4
7/17/2025	9,954	4.840	1,282,292	2.1.4
7/16/2025	9,953	4.840	1,281,549	2.1.4
7/15/2025	9,955	4.840	1,280,674	2.1.4
7/13/2025	9,948	4.840	1,278,845	2.1.4
7/12/2025	9,940	4.840	1,277,917	2.1.4
7/11/2025	9,933	4.840	1,276,930	2.1.4
7/10/2025	9,929	4.840	1,275,528	2.1.4
7/9/2025	9,921	4.840	1,272,434	2.1.4
7/8/2025	9,914	4.840	1,271,122	2.1.4
7/7/2025	9,914	4.840	1,271,122	2.1.4
6/17/2025	9,865	4.810	1,256,491	2.1.4
6/16/2025	9,862	4.810	1,255,987	2.1.4
6/13/2025	9,855	4.810	1,254,529	2.1.4
6/8/2025	9,846	4.810	1,251,792	N/A
5/24/2025	9,817	4.810	1,245,258	N/A
5/22/2025	9,810	4.810	1,244,378	N/A

Details

This application is a simple Japanese abacus (soroban / そろばん). It has a free mode where you can use the abacus freely, and a challenge mode with 4 operations (addition, subtraction, one and two digit multiplication, and division) and 3 difficulty levels (easy, medium, hard) where you must race against the clock to perform calculations.

Contains tutorials for:
* basic concepts
* addition
* subtraction
* one-digit multiplication
* two-digit multiplication
* division

Also has a custom challenge mode where you can set the number of questions, type of questions and difficulty.

(This is just a hobby project I'm doing for fun. This app is free and doesn't have in-app purchases or ads).

[PERMISSIONS USAGE]
This is a description of how permissions are used in this app.
Vibrate: The application can vibrate the phone to give user feedback. This can be enabled/disabled in the Settings screen.

[PRIVACY]
This application does not collect or transmit any data. Your settings, ranking and challenge times are stored locally on your phone only.
You can view the privacy policy here: http://bit.ly/simple-soroban-privacy

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