# bluSensor vs Detector CO2

The clearest difference is rating: Detector CO2 at 2.0 against bluSensor's 1.0. Detector CO2 also leads on update cadence (every 3 weeks vs every 2 months) and iOS requirement (10.0 vs 15.6). bluSensor's advantage is ratings volume (5 vs 1). On price, ads, in-app purchases and monetization model there is nothing between them.

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

Detector CO2 holds the better App Store score, 2.0 against 1.0. That said, the two scores are not equally well evidenced: bluSensor has 5 ratings behind it against 1, so its average is the more settled of the two.

bluSensor ships an update every 2 months, Detector CO2 every 3 weeks. The most recent releases landed on September 9, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | bluSensor | Detector CO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [1.0 (5 ratings)](https://appshunter.io/ios/app/blusensor/id1018752395/reviews) | **[2.0 (1 ratings)](https://appshunter.io/ios/app/detector-co2/id1561126616/reviews)** |
| Number of ratings | **5** | 1 |
| Positive reviews | 0.0% of reviews | — |
| In-app purchases | No | No |
| Ads | No | No |
| Update frequency | Every 2 months | **Every 3 weeks** |
| Monetization | Free | Free |
| Size | 31 MB | 9 MB |
| Requires iOS | 15.6 | **10.0** |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Age rating | 4+ | 4+ |
| Developer | [Almendo Technologies GmbH](https://appshunter.io/developer/1018752244) | [Geotap Games S.L.](https://appshunter.io/developer/596729068) |

## What reviewers say

### bluSensor

[App page](https://appshunter.io/ios/app/blusensor/id1018752395)

Monitor temperature, humidity, and air quality with wireless sensors. Get real-time data, alerts, and historical tracking on your smartphone or tablet. Suitable for home and professional environments.

**Highlights:** Real-time environmental monitoring, Temperature and humidity tracking, Air quality alerts, Historical data logging, Smartphone and tablet compatibility, Web app access

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

**In-app purchases:** none


### Detector CO2

[App page](https://appshunter.io/ios/app/detector-co2/id1561126616)

Measure ambient CO2 levels using a compatible device. This utility app provides environmental data for your surroundings.

**Highlights:** Measure CO2 levels, Utilizes device capabilities, Environmental data display

**Features:** macOS Compatibility

**In-app purchases:** none


## Frequently asked questions

### Is bluSensor free?

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

### Is Detector CO2 free?

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

### Which has better reviews, bluSensor or Detector CO2?

Detector CO2 is rated higher. bluSensor averages 1.0 out of 5 from 5 ratings, while Detector CO2 averages 2.0 from 1 ratings.

### Do bluSensor or Detector CO2 have ads?

Neither bluSensor nor Detector CO2 shows ads.

### Which is updated more often, bluSensor or Detector CO2?

bluSensor ships an update every 2 months, and Detector CO2 every 3 weeks. Most recently, bluSensor was updated on September 9, 2026 and Detector CO2 on October 1, 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.*