# Subtraction Math Trainer vs Capillary Pressure

The clearest difference is price: Capillary Pressure at Free against Subtraction Math Trainer's $2.99. Capillary Pressure also leads on iOS requirement (9.0 vs 12.0). On ads, in-app purchases and device support there is nothing between them.

Capillary Pressure is free to download; Subtraction Math Trainer costs $2.99 up front. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Subtraction Math Trainer | Capillary Pressure |
| --- | --- | --- |
| Price | $2.99 | **Free** |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 34 months | — |
| Size | 18 MB | 65 MB |
| Requires iOS | 12.0 | **9.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Sergey Malugin](https://appshunter.io/developer/562782409) | [Natalia Shelyago](https://appshunter.io/developer/1618907003) |

## What reviewers say

### Subtraction Math Trainer

[App page](https://appshunter.io/ios/app/subtraction-math-trainer/id1197851863)

**Features:** macOS Compatibility

**In-app purchases:** none


### Capillary Pressure

[App page](https://appshunter.io/ios/app/capillary-pressure/id1485356778)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Subtraction Math Trainer free?

Subtraction Math Trainer costs $2.99, with no in-app purchases.

### Is Capillary Pressure free?

Capillary Pressure is free to download, with no in-app purchases.

### Do Subtraction Math Trainer or Capillary Pressure have ads?

Neither Subtraction Math Trainer nor Capillary Pressure shows ads.

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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.*