# 【CO2センサー】換気エアミエル vs Day See

The clearest difference is iOS requirement: 【CO2センサー】換気エアミエル at 12.1 against Day See's 14.6. On price and in-app purchases there is nothing between them.

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

## The numbers

| Metric | 【CO2センサー】換気エアミエル | Day See |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Size | 37 MB | 12 MB |
| Requires iOS | **12.1** | 14.6 |
| Age rating | 12+ | 4+ |
| Developer | [Step One Limited](https://appshunter.io/developer/646296997) | [LITERAL, K.K.](https://appshunter.io/developer/1483893515) |

## What reviewers say

### 【CO2センサー】換気エアミエル

[App page](https://appshunter.io/ios/app/co2/id1549479731)

**In-app purchases:** none


### Day See

[App page](https://appshunter.io/ios/app/day-see/id6446186680)

**In-app purchases:** none


## Frequently asked questions

### Is 【CO2センサー】換気エアミエル free?

【CO2センサー】換気エアミエル is free to download, with no in-app purchases.

### Is Day See free?

Day See 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.*