Comparison

Abacus Lesson vs Cabacus

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

Abacus Lesson

Learn addition and subtraction using a virtual abacus, also known as a Soroban. This app helps you develop mental calculation skills, enabling you to perform calculations without physical tools.

Highlights
  • Learn addition
  • Learn subtraction
  • Virtual abacus (Soroban)
  • Develop mental calculation skills
  • Perform calculations without physical tools
Features
Read full description

This is an app that you can learn addition and subtraction using an abacus. An abacus is named "Soroban" in Japan. Do you know what an abacus is? The abacus is very simple calculator used in China, Japan, Korea and so on. Some people may say "Isn't it an unnecessary tool if you have a calculator such as a smartphone?". Answer would be "No". The biggest difference between electric calculators and the abacus is whether you need to hold it in your hand when calculating. Because of its simplicity, you will be able to easily use the abacus in your mind. Imagine that you can use calculations of about 3 digits in your life without physical tools. This app will give you the skill of calculation.

About

Cabacus

Features
Read full description

Brought to you by cabacus.school Coming Soon: - Arithmetic challenges and exercises (+, −, ×, ÷) - More colors Want to become a math master? Cabacus is your pocket abacus! Train your brain for super-fast mental math. Easy to use. Just tap to move the beads, tap on CABACUS to reset to zero. Perfect for learning arithmetic. Visualizing numbers on the abacus makes math super easy and fun! Used for centuries, the abacus boosts math skills, concentration, and number sense. Whether you are a student, teacher, or just a curious learner, Cabacus lets you explore the power of the abacus anytime, anywhere. Develop powerful mental math abilities through interactive practice. Download Cabacus now and see why the abacus is one of humanity's greatest inventions!

Screenshots

Abacus Lesson3 screens
Cabacus4 screens

Verdict

The call

The clearest difference is price: Abacus Lesson at Free against Cabacus's $7.99. Abacus Lesson also leads on update cadence (every 3 weeks vs every 14 months). Cabacus's advantage is in-app purchases (none vs 3) and ads (none vs shown). On device support and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Abacus Lesson is free to download; Cabacus costs $7.99 up front. Abacus Lesson sells 3 one-off in-app purchases. Cabacus asks for nothing beyond the download.

UpkeepUpdate frequency

Abacus Lesson ships an update every 3 weeks, Cabacus every 14 months. The most recent releases landed on October 29, 2026 and October 27, 2026 respectively.

Scorecard4 real differences · 6 level
Abacus Lesson versus Cabacus: the parameters behind the verdict, then further details
ParameterAbacus LessonCabacus
PriceFree — better$7.99
Rating4.9 (836 ratings) — better—
Positive reviews93.1% of reviews—
Number of ratings836 — better—
Update frequencyEvery 3 weeks — betterEvery 14 months
AdsYesNo — better
In-app purchasesYesNo — better
MonetizationFree with in-app purchases—
DevicesiPhone, iPad, iPodiPhone, iPad, iPod
Requires iOS11.0 — better12.0
Further details — not scored
Size138 MB28 MB
Age rating4+4+
DeveloperHirokazu KomatsuBenjamin Tan

Bugs and requests

Abacus Lesson

Reported bugs

4 issues
  • Accidental app closure on iPhone during bead swiping
  • Error in lesson 3 addition summary
  • Sloppy English translation causing confusion
  • Lessons difficult to read visually

Requested features

6 requests
  • Add Chinese Abacus (Suanpan) option
  • Landscape view support
  • Level skip functionality
  • Better English translation/editing
  • Clearer problem presentation with equation format
Show 1 more
  • Improved lesson readability

Cabacus

Not enough reviews yet to summarise bugs or requests.

In-app purchases

3 purchases

Abacus Lesson

One-time3
  • Donation Lv1 for hiding Ad$1.99
  • Donation Lv2 for hiding Ad$3.99
  • Donation Lv3 for hiding Ad$8.99
None

Cabacus

No in-app purchases

Questions

Is Abacus Lesson free?
Abacus Lesson is free to download, with in-app purchases available.
Is Cabacus free?
Cabacus costs $7.99, with no in-app purchases.
Do Abacus Lesson or Cabacus have ads?
Abacus Lesson shows ads; Cabacus does not.
Which is updated more often, Abacus Lesson or Cabacus?
Abacus Lesson ships an update every 3 weeks, and Cabacus every 14 months. Most recently, Abacus Lesson was updated on October 29, 2026 and Cabacus on October 27, 2026.

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