# Abacus Exercise vs RNJ Academy

The clearest difference is in-app purchases: Abacus Exercise at none against RNJ Academy's 10. Abacus Exercise also leads on iOS requirement (11.0 vs 15.5). RNJ Academy's advantage is ads (none vs shown). On price and device support there is nothing between them.

Both are free to download. RNJ Academy sells 10 one-off in-app purchases. Abacus Exercise asks for nothing beyond the download.

## The numbers

| Metric | Abacus Exercise | RNJ Academy |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.5 (60 ratings)](https://appshunter.io/ios/app/abacus-exercise/id1523833529/reviews)** | — |
| Number of ratings | **60** | — |
| Positive reviews | 46.2% of reviews | — |
| In-app purchases | **No** | Yes |
| Ads | Yes | **No** |
| Update frequency | Every 3 weeks | — |
| Monetization | Ad-supported | — |
| Size | 90 MB | 146 MB |
| Requires iOS | **11.0** | 15.5 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Hirokazu Komatsu](https://appshunter.io/developer/1523833531) | [Online Learning](https://appshunter.io/developer/1790866777) |

## What reviewers say

### Abacus Exercise

[App page](https://appshunter.io/ios/app/abacus-exercise/id1523833529)

Practice abacus calculations with a customizable digital tool. Adjust bead colors, sounds, and layout for a personalized learning experience. Challenge yourself with addition, subtraction, multiplication, and division exercises.

**Highlights:** Customizable abacus layout, Adjustable bead size and position, Up to 15-digit support, Customizable bead colors and sounds, Addition, subtraction, multiplication, division practice, Level-based challenges

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

**In-app purchases:** none


### RNJ Academy

[App page](https://appshunter.io/ios/app/rnj-academy/id6738187170)

**In-app purchases (10)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Package - AL | $29.99 | one-time |
| Package - AT | $34.99 | one-time |
| Package - BB | $39.99 | one-time |
| Package - AY | $39.99 | one-time |
| Package - BC | $39.99 | one-time |
| Package - AW | $39.99 | one-time |
| Package - AX | $39.99 | one-time |
| Package - BG | $49.99 | one-time |
| Package - BF | $49.99 | one-time |
| Package - BH | $49.99 | one-time |


## Frequently asked questions

### Is Abacus Exercise free?

Abacus Exercise is free to download, with no in-app purchases.

### Is RNJ Academy free?

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

### Do Abacus Exercise or RNJ Academy have ads?

Abacus Exercise shows ads; RNJ Academy does not.

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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.*