# Monitor Your World vs Physical Changes in Matter

Monitor Your World and Physical Changes in Matter are too close to call on the numbers: across 5 compared parameters — price, ads, in-app purchases and device support among them — neither pulls far enough ahead to decide it. What separates them is feature set and interface, not measurable difference.

Both are free to download. Neither carries in-app purchases, so what you see is what you pay.

## The numbers

| Metric | Monitor Your World | Physical Changes in Matter |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 50 months | — |
| Size | 3 MB | 30 MB |
| Requires iOS | 12.0 | 12.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [The Concord Consortium](https://appshunter.io/developer/890508659) | [Science Education Institute](https://appshunter.io/developer/1439710468) |

## What reviewers say

### Monitor Your World

[App page](https://appshunter.io/ios/app/monitor-your-world/id1499542910)

**Features:** macOS Compatibility

**In-app purchases:** none


### Physical Changes in Matter

[App page](https://appshunter.io/ios/app/physical-changes-in-matter/id6514314103)

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is Monitor Your World free?

Monitor Your World is free to download, with no in-app purchases.

### Is Physical Changes in Matter free?

Physical Changes in Matter is free to download, with no in-app purchases.

### Do Monitor Your World or Physical Changes in Matter have ads?

Neither Monitor Your World nor Physical Changes in Matter 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.*