# Fahrenheit Thermometer Plus vs Detector CO2

The clearest difference is rating: Fahrenheit Thermometer Plus at 4.3 against Detector CO2's 2.0. Fahrenheit Thermometer Plus also leads on ratings volume (269 vs 1). Detector CO2's advantage is ads (none vs shown) and update cadence (every 3 weeks vs every 10 months). On price, 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.

Fahrenheit Thermometer Plus holds the better App Store score, 4.3 against 2.0. That said, the two scores are not equally well evidenced: Fahrenheit Thermometer Plus has 269 ratings behind it against 1, so its average is the more settled of the two.

Fahrenheit Thermometer Plus ships an update every 10 months, Detector CO2 every 3 weeks. The most recent releases landed on September 27, 2026 and October 1, 2026 respectively.

## The numbers

| Metric | Fahrenheit Thermometer Plus | Detector CO2 |
| --- | --- | --- |
| Price | Free | Free |
| Rating | **[4.3 (269 ratings)](https://appshunter.io/ios/app/fahrenheit-thermometer-plus/id561382275/reviews)** | [2.0 (1 ratings)](https://appshunter.io/ios/app/detector-co2/id1561126616/reviews) |
| Number of ratings | **269** | 1 |
| Positive reviews | 33.3% of reviews | — |
| In-app purchases | No | No |
| Ads | Yes | **No** |
| Update frequency | Every 10 months | **Every 3 weeks** |
| Monetization | Ad-supported | **Free** |
| Size | 11 MB | 9 MB |
| Requires iOS | 12.0 | **10.0** |
| Devices | iPhone, iPod | **iPhone, iPad, iPod** |
| Age rating | 4+ | 4+ |
| Developer | [SHIGETO TAKAGI](https://appshunter.io/developer/519611619) | [Geotap Games S.L.](https://appshunter.io/developer/596729068) |

## What reviewers say

### Fahrenheit Thermometer Plus

[App page](https://appshunter.io/ios/app/fahrenheit-thermometer-plus/id561382275)

This free digital thermometer app uses GPS to measure and display the ambient temperature in Fahrenheit. It includes a Fahrenheit to Celsius conversion calculator and a barometer function for compatible devices. It also shows sunrise and sunset times, offering a reference for outdoor activities.

**Highlights:** GPS ambient temperature measurement, Fahrenheit to Celsius conversion calculator, Barometer function (iPhone 6/Plus and later), Badge displays Fahrenheit temperature, Sunrise and sunset time display

**Features:** 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 Fahrenheit Thermometer Plus free?

Fahrenheit Thermometer Plus 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, Fahrenheit Thermometer Plus or Detector CO2?

Fahrenheit Thermometer Plus is rated higher. Fahrenheit Thermometer Plus averages 4.3 out of 5 from 269 ratings, while Detector CO2 averages 2.0 from 1 ratings.

### Do Fahrenheit Thermometer Plus or Detector CO2 have ads?

Fahrenheit Thermometer Plus shows ads; Detector CO2 does not.

### Which is updated more often, Fahrenheit Thermometer Plus or Detector CO2?

Fahrenheit Thermometer Plus ships an update every 10 months, and Detector CO2 every 3 weeks. Most recently, Fahrenheit Thermometer Plus was updated on September 27, 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.*