# Detector CO2 vs Stud Finder

The clearest difference is rating: Stud Finder at 3.9 against Detector CO2's 2.0. Stud Finder also leads on ratings volume (7 vs 1). Detector CO2's advantage is in-app purchases (none vs 1) and iOS requirement (10.0 vs 18.6). On price, update cadence, ads and monetization model there is nothing between them.

Both are free to download. Stud Finder sells 1 one-off in-app purchase. Detector CO2 asks for nothing beyond the download.

Stud Finder holds the better App Store score, 3.9 against 2.0. That said, the two scores are not equally well evidenced: Stud Finder has 7 ratings behind it against 1, so its average is the more settled of the two.

Detector CO2 ships an update every 3 weeks, Stud Finder every 11 days. The most recent releases landed on October 15, 2026 and October 2, 2026 respectively.

## The numbers

| Metric | Detector CO2 | Stud Finder |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/detector-co2/id1561126616/reviews) | **[3.9 (7 ratings)](https://appshunter.io/ios/app/stud-finder-studspotter/id6736481050/reviews)** |
| Number of ratings | 1 | **7** |
| Positive reviews | — | 0.0% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 11 days** |
| Monetization | Free | Free |
| Size | 9 MB | 9 MB |
| Requires iOS | **10.0** | 18.6 |
| Devices | **iPhone, iPad, iPod** | iPhone, iPad |
| Age rating | 4+ | 4+ |
| Developer | [Geotap Games S.L.](https://appshunter.io/developer/596729068) | [LimeLime Labs LLC](https://appshunter.io/developer/1002915290) |

## What reviewers say

### 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


### Stud Finder

[App page](https://appshunter.io/ios/app/stud-finder-studspotter/id6736481050)

This utility app helps locate studs and metal behind walls using magnetic field detection. It also provides a precision level tool for accurate alignment and angle measurements, ideal for home improvement and professional projects.

**Highlights:** Magnetic stud and metal detection, Precision level tool, Angle measurement, Intuitive interface, Accurate results, Multiple utilities in one app

**Features:** macOS Compatibility

**In-app purchases (1)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Unlock Pro | $0.99 | one-time |


## Frequently asked questions

### Is Detector CO2 free?

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

### Is Stud Finder free?

Stud Finder is free to download, with in-app purchases available.

### Which has better reviews, Detector CO2 or Stud Finder?

Stud Finder is rated higher. Detector CO2 averages 2.0 out of 5 from 1 ratings, while Stud Finder averages 3.9 from 7 ratings.

### Do Detector CO2 or Stud Finder have ads?

Neither Detector CO2 nor Stud Finder shows ads.

### Which is updated more often, Detector CO2 or Stud Finder?

Detector CO2 ships an update every 3 weeks, and Stud Finder every 11 days. Most recently, Detector CO2 was updated on October 15, 2026 and Stud Finder on October 2, 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.*