Ninimaths vs Abacus Lesson
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
Ninimaths
This app offers daily mental arithmetic training with customizable exercises. Track your progress through daily scores and compete with others using the ranking function. Engage in timed challenges to sharpen your calculation speed.
- 5 calculation modes (add, subtract, multiply, divide, mixed)
- Customizable number ranges (1-5 digits)
- Column format display
- Daily score tracking and graphs
- Game Center ranking
- Time trial challenges
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Ninimaths is an application to train mental arithmetic ability. Characteristic: - Selection from 5 modes of calculation, addition, subtraction, multiplication, division, mixing - 1 to 5 digit numbers can be freely combined - Corresponds to display in the column format - Daily scores are recorded for each mode and displayed on the graph - Ranking function by Game Center - Time trial to measure strictly
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.
- Learn addition
- Learn subtraction
- Virtual abacus (Soroban)
- Develop mental calculation skills
- Perform calculations without physical tools
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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.
Screenshots
Verdict
The clearest difference is ads: Ninimaths at none against Abacus Lesson's shown. Abacus Lesson's advantage is ratings volume (839 vs 48) and update cadence (every 3 weeks vs every 2 months). On price, rating, review sentiment and in-app purchases 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
Both are free to download. Ninimaths sells 3 one-off in-app purchases and Abacus Lesson sells 3 one-off in-app purchases. Whichever you choose, the download price is not the number that matters.
On the App Store both sit at effectively the same score — 4.9 for Ninimaths against 4.9 for Abacus Lesson. That said, the two scores are not equally well evidenced: Abacus Lesson has 839 ratings behind it against 48, so its average is the more settled of the two. Written reviews are what separate them: 97% of Ninimaths's written reviews are positive against 93% of Abacus Lesson's.
Ninimaths ships an update every 2 months, Abacus Lesson every 3 weeks. The most recent releases landed on November 6, 2026 and November 7, 2026 respectively.
| Parameter | Ninimaths | Abacus Lesson |
|---|---|---|
| Price | Free | Free |
| Rating | 4.9 (48 ratings) — better | 4.9 (839 ratings) |
| Positive reviews | 97.5% of reviews — better | 93.3% of reviews |
| Number of ratings | 48 | 839 — better |
| Update frequency | Every 2 months | Every 3 weeks — better |
| Ads | No — better | Yes |
| In-app purchases | Yes | Yes |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 15.0 | 11.0 — better |
| Further details — not scored | ||
| Size | 11 MB | 138 MB |
| Age rating | 4+ | 4+ |
| Developer | Ninicode | Hirokazu Komatsu |
Customer experience
Ninimaths
Abacus Lesson
Bugs and requests
Ninimaths
Not enough reviews yet to summarise bugs or 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
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- Improved lesson readability
In-app purchases
Ninimaths
- Coffee$0.99
- Hamburger$1.99
- Ramen$4.99
Abacus Lesson
- Donation Lv1 for hiding Ad$1.99
- Donation Lv2 for hiding Ad$3.99
- Donation Lv3 for hiding Ad$8.99
Questions
Is Ninimaths free?
Is Abacus Lesson free?
Which has better reviews, Ninimaths or Abacus Lesson?
Do Ninimaths or Abacus Lesson have ads?
Which is updated more often, Ninimaths or Abacus Lesson?
Other comparisons
