# Detector CO2 vs Stud Finder Wall Detector Tool

The clearest difference is rating: Stud Finder Wall Detector Tool at 4.1 against Detector CO2's 2.0. Stud Finder Wall Detector Tool also leads on ratings volume (256 vs 1) and update cadence (every 9 days vs every 3 weeks). Detector CO2's advantage is in-app purchases (none vs 10) and iOS requirement (10.0 vs 16.0). On price, ads and device support there is nothing between them.

Both are free to download. Stud Finder Wall Detector Tool sells 9 in-app purchases, starting at $9.99 per 7 days. Detector CO2 asks for nothing beyond the download.

Stud Finder Wall Detector Tool holds the better App Store score, 4.1 against 2.0. That said, the two scores are not equally well evidenced: Stud Finder Wall Detector Tool has 256 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 Wall Detector Tool every 9 days. The most recent releases landed on November 3, 2026 and November 8, 2026 respectively.

## The numbers

| Metric | Detector CO2 | Stud Finder Wall Detector Tool |
| --- | --- | --- |
| Price | Free | Free |
| Rating | [2.0 (1 ratings)](https://appshunter.io/ios/app/detector-co2/id1561126616/reviews) | **[4.1 (256 ratings)](https://appshunter.io/ios/app/stud-finder-wall-detector-tool/id6477968944/reviews)** |
| Number of ratings | 1 | **256** |
| Positive reviews | — | 6.1% of reviews |
| In-app purchases | **No** | Yes |
| Ads | No | No |
| Update frequency | Every 3 weeks | **Every 9 days** |
| Monetization | **Free** | Subscription |
| Size | 9 MB | 19 MB |
| Requires iOS | **10.0** | 16.0 |
| Devices | iPhone, iPad, iPod | iPhone, iPad, Apple Watch |
| Age rating | 4+ | 4+ |
| Developer | [Geotap Games S.L.](https://appshunter.io/developer/596729068) | [Optimize IT](https://appshunter.io/developer/1671426874) |

## 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 Wall Detector Tool

[App page](https://appshunter.io/ios/app/stud-finder-wall-detector-tool/id6477968944)

This multi-tool app helps you find studs, measure angles, and check levels with precision. It offers real-time visual, sound, and haptic alerts, along with an Apple Watch companion for convenient monitoring. Built-in tutorials guide you through its features.

**Highlights:** Magnetic stud finder with multiple presets, Accurate bubble level for surfaces, Advanced angle finder for measurements, Customizable sound and haptic feedback, Apple Watch companion app, Detailed visual indicators, Built-in tutorials and guides

**Features:** Apple Watch app

**In-app purchases (9)**

| Purchase | Price | Billing |
| --- | --- | --- |
| Weekly | $9.99 | per 7 days |
| Weekly Pro | $9.99 | per 7 days |
| Weekly VIP | $9.99 | per 7 days |
| Weekly | $12.99 | per 7 days |
| Annual Pro | $29.99 | per year |
| Annual | $29.99 | per year |
| Annual VIP | $29.99 | per year |
| Annual VIP | $49.99 | per year |
| Monthly VIP | $49.99 | per month |

**What reviewers like**

- 👍 Worked great once
- 👍 Found the stud so fast
- 👍 Accurate stud finding

**What reviewers complain about**

- 👎 Does not work
- 👎 Scam app
- 👎 Waste of money
- 👎 Cannot cancel subscription
- 👎 Charged immediately

**Reported bugs**

- App falsely identifies studs when phone is in the air
- Scan never starts working
- Unable to cancel subscription
- Charged despite attempting to cancel
- App does not work

**Requested features**

- Improve accuracy on wood studs
- Provide clear instructions on how to use the app
- Offer a reliable cancellation method
- Add support for wood studs
- Fix the 'Start Scan' button issue


## Frequently asked questions

### Is Detector CO2 free?

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

### Is Stud Finder Wall Detector Tool free?

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

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

Stud Finder Wall Detector Tool is rated higher. Detector CO2 averages 2.0 out of 5 from 1 ratings, while Stud Finder Wall Detector Tool averages 4.1 from 256 ratings.

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

Neither Detector CO2 nor Stud Finder Wall Detector Tool shows ads.

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

Detector CO2 ships an update every 3 weeks, and Stud Finder Wall Detector Tool every 9 days. Most recently, Detector CO2 was updated on November 3, 2026 and Stud Finder Wall Detector Tool on November 8, 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.*