# Ninimaths vs Abacus Lesson

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.

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.

## The numbers

| Metric | Ninimaths | Abacus Lesson |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.9 (48 ratings)](https://appshunter.io/ios/app/ninimaths/id647989498/reviews)** | [4.9 (839 ratings)](https://appshunter.io/ios/app/abacus-lesson-add-and-sub/id1526785916/reviews) |
| Number of ratings | 48 | **839** |
| Positive reviews | **97.5% of reviews** | 93.3% of reviews |
| In-app purchases | Yes | Yes |
| Ads | **No** | Yes |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free with in-app purchases | Free with in-app purchases |
| Size | 11 MB | 138 MB |
| Requires iOS | 15.0 | **11.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Ninicode](https://appshunter.io/developer/647989501) | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) |

## What reviewers say

### Ninimaths

[App page](https://appshunter.io/ios/app/ninimaths/id647989498)

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.

**Highlights:** 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

**Features:** macOS Compatibility, Vision Pro support, iPhone Duo support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Coffee | $0.99 | one-time |
| Hamburger | $1.99 | one-time |
| Ramen | $4.99 | one-time |


### Abacus Lesson

[App page](https://appshunter.io/ios/app/abacus-lesson-add-and-sub/id1526785916)

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:** macOS Compatibility, Vision Pro support

**In-app purchases (3)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Donation Lv1 for hiding Ad | $1.99 | one-time |
| Donation Lv2 for hiding Ad | $3.99 | one-time |
| Donation Lv3 for hiding Ad | $8.99 | one-time |

**What reviewers like**

- 👍 Beginner-friendly and easy to use
- 🚀 Quick to learn basic concepts
- 📚 Clear and simple explanations
- 🎯 Effective teaching methodology
- 💰 Free with no ads

**What reviewers complain about**

- 🌐 Poor English translation quality
- 📖 Lessons sometimes hard to read
- ❌ Cannot skip levels
- ⚡ Difficulty progression too steep
- 🐛 App closes accidentally on iPhone when swiping

**Reported bugs**

- 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**

- Add Chinese Abacus (Suanpan) option
- Landscape view support
- Level skip functionality
- Better English translation/editing
- Clearer problem presentation with equation format


## Frequently asked questions

### Is Ninimaths free?

Ninimaths is free to download, with in-app purchases available.

### Is Abacus Lesson free?

Abacus Lesson is free to download, with in-app purchases available.

### Which has better reviews, Ninimaths or Abacus Lesson?

Ninimaths is rated higher. Ninimaths averages 4.9 out of 5 from 48 ratings, while Abacus Lesson averages 4.9 from 839 ratings.

### Do Ninimaths or Abacus Lesson have ads?

Abacus Lesson shows ads; Ninimaths does not.

### Which is updated more often, Ninimaths or Abacus Lesson?

Ninimaths ships an update every 2 months, and Abacus Lesson every 3 weeks. Most recently, Ninimaths was updated on November 6, 2026 and Abacus Lesson on November 7, 2026.

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*Compared by [AppsHunter](https://appshunter.io/) from daily US App Store data. Review summaries are generated from verbatim App Store reviews.*