# Subtraction School ! ! vs Studio 789

The clearest difference is price: Studio 789 at Free against Subtraction School ! !'s $4.99. Studio 789 also leads on iOS requirement (12.0 vs 15.0). Subtraction School ! !'s advantage is device support. On in-app purchases there is nothing between them.

Studio 789 is free to download; Subtraction School ! ! costs $4.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Subtraction School ! ! | Studio 789 |
| --- | --- | --- |
| Price | $4.99 | **Free** |
| Rating | **[5.0 (2 ratings)](https://appshunter.io/ios/app/subtraction-school/id447548515/reviews)** | — |
| Number of ratings | **2** | — |
| Positive reviews | 50.0% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | — |
| Update frequency | Every 12 months | — |
| Monetization | Paid | — |
| Size | 13 MB | 18 MB |
| Requires iOS | 15.0 | **12.0** |
| Devices | **iPhone, iPad, iPod** | — |
| Age rating | 4+ | 4+ |
| Developer | [Horizon Business, Inc.](https://appshunter.io/developer/431586531) | [Dreamware Limited](https://appshunter.io/developer/892413586) |

## What reviewers say

### Subtraction School ! !

[App page](https://appshunter.io/ios/app/subtraction-school/id447548515)

Master subtraction with this educational app. It offers practice from single-digit to multi-digit problems, with guided tutorials and hints to help users learn step-by-step.

**Highlights:** 1 to 6 digit problems, Random or custom problems, Tutorial animation speed, Step-by-step solution guide, Hint button for guidance, Help button for step completion

**Features:** macOS Compatibility

**In-app purchases:** none


### Studio 789

[App page](https://appshunter.io/ios/app/studio-789/id6451241270)

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction School ! ! free?

Subtraction School ! ! costs $4.99, with no in-app purchases.

### Is Studio 789 free?

Studio 789 is free to download, with no in-app purchases.

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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.*