# monitorCat vs Luxafor CO2

The clearest difference is update cadence: monitorCat at fortnightly against Luxafor CO2's every 2 months. monitorCat also leads on iOS requirement (8.0 vs 14.0). On price, ads, in-app purchases and device support there is nothing between them.

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

monitorCat ships an update fortnightly, Luxafor CO2 every 2 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.

## The numbers

| Metric | monitorCat | Luxafor CO2 |
| --- | --- | --- |
| Price | Free | Free |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | **Fortnightly** | Every 2 months |
| Size | 8 MB | 54 MB |
| Requires iOS | **8.0** | 14.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Wei Zhao](https://appshunter.io/developer/981750643) | [Greynut LTD](https://appshunter.io/developer/1559879692) |

## What reviewers say

### monitorCat

[App page](https://appshunter.io/ios/app/monitorcat/id1385674787)

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

**In-app purchases:** none


### Luxafor CO2

[App page](https://appshunter.io/ios/app/luxafor-co2/id6444873126)

**In-app purchases:** none


## Frequently asked questions

### Is monitorCat free?

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

### Is Luxafor CO2 free?

Luxafor CO2 is free to download, with no in-app purchases.

### Do monitorCat or Luxafor CO2 have ads?

Neither monitorCat nor Luxafor CO2 shows ads.

### Which is updated more often, monitorCat or Luxafor CO2?

monitorCat ships an update fortnightly, and Luxafor CO2 every 2 months. Most recently, monitorCat was updated on October 12, 2026 and Luxafor CO2 on October 5, 2026.

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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.*