Appworthy

Simple Soroban

This application is a simple Japanese abacus (soroban / そろばん).

Btco
Get it onGoogle Play
Google Play rating5.0★10.9K ratings
PriceFreeListed price
Age4+Store age rating
CategoryEducation
DeveloperBtco

What we found

Full report

Too little checked to say Only reviews have been read so far (400 reviews). The app itself hasn’t been analysed.

Money

  • Free to download.

From review signals only, 27 Oct 2026.

The store currently lists version 2.1.4, updated 2024-08-11.

Preview

Screenshot 1Screenshot 2Screenshot 3Screenshot 4Screenshot 5Screenshot 6Screenshot 7Screenshot 8

Store screenshots supplied by the developer.

About this app

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.…

From the developer’s store description.

For developers and the curious

The full report

The evidence, sources, measurements and versions behind every label above.

Findings and evidence

No findings published
No findings are published for this listing. These are review signals, not findings: nothing here is an assessment.

Review signals 1

Recurring themes across the reviews we scanned. Each links to what reviewers report.

What reviewers report

400 reviews read · 1 review signal

400 reviews scanned. These are signals from public reviews, not findings. Nothing here is an assessment.

No ad complaints

Review signal, not a finding

32 reviews · about 1 in 13 reviews we read

I never write reviews, but this one really deserves it! EXCELLENT! Honestly, the best soroban app I’ve found. It genuinely feels like I’m playing a game. No ads, so many quizzes! I just love it! I especially love the formulas at the end…

5★ · Google Play · 2026-08-27

this app is the best in everyway, no ads,not to be online to work. teaching abacus along number digits. I also used it for my exam and it helped me pass the exam. it has a relaxed mode where you can earn badges. even the settings are…

5★ · Google Play · 2026-07-01

best abacus app I've experienced so far. helpful tutorials, no ads, and I appreciate that the equation highlights when you get to the next step, so you have some feedback that you're on the right track when learning.

5★ · Google Play · 2025-12-09

A sampled review illustrates one person’s experience. It does not establish a finding on its own.

Measurements

5 measured · 3 not assessed

“Not assessed” means we could not measure it. It is never a zero and never a pass.

From store data and reviews

Developer replies to reviews
Replies to fewer than 1 review in 20
Price in the store description
The store description doesn’t list prices (most don’t)
Cancelling, in the store description
The store description doesn’t say how to cancel (most don’t)
Themes reported by reviewers
No theme reported
Counted from the reviews we have read for this app. "No theme reported" means no theme reached our reporting threshold — it is not a finding that nothing is wrong with this app, and we do not say it is.
Five-star share of ratings
90% or more five-star
Arithmetic on the stores' own published rating counts. It says nothing about why the ratings fall where they do.

In the app package we scanned

No package has been scanned for this app, so nothing is published about what it ships. That is an absence of evidence, not a finding.

Sensitive permissions
Not assessed
No package has been scanned for this app
Analytics or tracking SDKs in the scanned package
Not assessed
No package has been scanned for this app
Advertising SDKs in the scanned package
Not assessed
No package has been scanned for this app
How we know

Supporting measurements: not a complete list of possible harms or positives. Measurement vocabulary 1.4 · how these are measured

Versions and dates analysed

Review signals only

Review signals only. No automated analysis of the app itself has been run, so there is no analysed version to report; the signals were read from public reviews on 27 Oct 2026.

Store update history

Each store’s release notes, as the developer wrote them. They are the developer’s words, not ours.

Google Play

Version 2.1.4 · 2024-08-11

No release notes were provided for this version.

Assessment record

Status
Review signals only
App identifier
simple-soroban
Review signals scanned
27 Oct 2026
Sources used
User reviews
Reviews read
400
Package examined
No package scan
Human inspection
Not completed
How we know
Measurement vocabulary
1.4

Store facts

Google Play

What the stores publish. Store ratings are the stores’ numbers, not Appworthy’s, and are never averaged across stores.

Google Play

Store rating
4.95 ★ · 10,878 ratings
Version
2.1.4
Updated
11 Aug 2024
Price
Free
Age rating
4+
Size
Not supplied
Open in Google Play
Developer
Btco
Category
Education
Listing price
Free

No itemized purchase list is available for this listing.

Method and limits

What this report can and cannot show

How a review signal works

A review signal is produced automatically from public app reviews by a classifier — never by a hands-on Appworthy test, and never by a human analyst. It exists so a real, not-yet-audited app can carry more than a blank “Not yet tested” listing, without ever being mistaken for an assessment.

A theme only appears above once at least 5 distinct reviews corroborate it — one angry review can never tag an app. These thresholds are published settings and may be tuned as coverage grows.

It carries no confirmed findings — reviews are one kind of evidence, and nothing here has been hands-on tested. The moment Appworthy publishes a full assessment of this app, it replaces this signal, permanently.

Limits of this report

  • A package scan is static. It identifies code and text in one Android build. It does not measure a live ad session, test a deletion request, or count the steps needed to cancel.
  • Reviews keep their sample. A review-only charge shows distinct reviewers, the share and the sample size, and is published only once it clears that label’s published threshold. Calibration labels are machine-drafted and not yet confirmed by a person.
  • Not assessed is a state. It is never a zero and never a pass.
  • A missing label is not a clean bill of health. It means the evidence did not support one, not that the app is problem-free.
Not yet human-reviewed. A human review replaces this review-derived signal with hands-on, recorded measurements. Hands-on inspections are not yet open.
Review thresholds Read the methodology For developers

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