Comparison

CO2 sensor vs Hidden & Spy Camera Detector

Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.

Head to head
About

CO2 sensor

Monitor CO2, temperature, and humidity levels in real-time using a Bluetooth sensor. Save readings with location data and sync them across Apple devices via iCloud. View historical data on a map.

Highlights
  • Real-time CO2, temperature, and humidity readings
  • Bluetooth sensor integration
  • Save readings with location
  • iCloud sync across devices
  • Map view of saved readings
  • Open source code available
Features
Read full description

Read CO2, temperature, and humidity from your Bluetooth Sensirion SCD-41 sensor in realtime. Save your readings with your current location and have it sync across your devices via iCloud. See previously saved readings with a map of the location that those readings were taken. Works across iPhone, iPad, and macOS devices. Open source code: https://github.com/sighmon/ios-ble-co2-sensor

About

Hidden & Spy Camera Detector

Protect your privacy by scanning your surroundings for hidden spy cameras. This app offers multiple detection methods, including Wi-Fi scanning and infrared detection, to help you identify suspicious devices in any location.

Highlights
  • Wi-Fi scanner for suspicious devices
  • Red dot detection via phone lens
  • Scans hotel rooms, bathrooms, and changing rooms
  • Protects user privacy
  • Easy-to-use interface
Features
Read full description

Welcome to Hidden & Spy Camera Detector! We have developed this application to help you protect your privacy. Does not matter where your are - hotel, conference room, bathroom, changing room - just make few click on the app to scan the place for hidden cameras. There are several easy-to-use options to detect spy cameras: WIFI Scanner - Scan your network for the suspicious devices Red dot detection - Find the infrared point of the camera through the phone lens Stay safe and keep your privacy! Privacy Policy: https://appslabs.org/privacy-policy/ Terms of Use: https://appslabs.org/terms-of-service/

Screenshots

CO2 sensor4 screens
Hidden & Spy Camera Detector4 screens

Verdict

The call

The clearest difference is in-app purchases: CO2 sensor at none against Hidden & Spy Camera Detector's 8. CO2 sensor also leads on ads (none vs shown) and device support (4 vs 2). Hidden & Spy Camera Detector's advantage is rating (3.9 vs 3.4) and ratings volume (835 vs 7). On price, update cadence and iOS requirement there is nothing between them.

Scored on Price · Rating · Positive reviews · Number of ratings · Update frequency · Ads · In-app purchases · Monetization · Best chart rank · Devices · Requires iOS

CostPrice · In-app purchases · Ads · Monetization

Both are free to download. Hidden & Spy Camera Detector sells 8 in-app purchases, starting at $2.99 per 7 days. CO2 sensor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Hidden & Spy Camera Detector holds the better App Store score, 3.9 against 3.4. That said, the two scores are not equally well evidenced: Hidden & Spy Camera Detector has 835 ratings behind it against 7, so its average is the more settled of the two.

UpkeepUpdate frequency

CO2 sensor ships an update every 12 months, Hidden & Spy Camera Detector every 8 months. The most recent releases landed on October 24, 2026 and October 30, 2026 respectively.

Scorecard6 real differences · 4 level
CO2 sensor versus Hidden & Spy Camera Detector: the parameters behind the verdict, then further details
ParameterCO2 sensorHidden & Spy Camera Detector
PriceFreeFree
Rating3.4 (7 ratings)3.9 (835 ratings) — better
Positive reviews—30.9% of reviews
Number of ratings7835 — better
Update frequencyEvery 12 monthsEvery 8 months — better
AdsNo — betterYes
In-app purchasesNo — betterYes
MonetizationFree — betterFree with in-app purchases
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.614.0 — better
Further details — not scored
Size0 MB141 MB
Age rating4+4+
DevelopersighmonApps Labs

Customer experience

CO2 sensor

All ratings7 ratings
Positive57.1%
Neutral28.6%
Negative14.3%

Hidden & Spy Camera Detector

All ratings819 ratings
Positive72.5%
Neutral4.0%
Negative23.4%
Written reviews110 reviews
Positive30.9%
Neutral4.5%
Negative64.5%

Bugs and requests

CO2 sensor

Not enough reviews yet to summarise bugs or requests.

Hidden & Spy Camera Detector

Reported bugs

2 issues
  • App crashes or shuts down during use
  • Doesn't detect known hidden cameras

Requested features

3 requests
  • Clearer instructions on how to use the app
  • Ability to easily cancel subscription
  • More reliable camera detection capabilities

In-app purchases

None

CO2 sensor

No in-app purchases

8 purchases

Hidden & Spy Camera Detector

Subscriptions7
  • Camera Detector$2.997 Days
  • Camera Detector$6.991 Month
  • Hidden Camera Detector3 Days trial$6.991 Month
Show 4 more
  • Spy Camera Detector3 Days trial$6.997 Days
  • Hidden Camera$19.991 Year
  • Spy Camera$39.991 Year
  • Hidden Camera3 Days trial$39.991 Year
One-time1
  • Camera Detect$49.99

Questions

Is CO2 sensor free?
CO2 sensor is free to download, with no in-app purchases.
Is Hidden & Spy Camera Detector free?
Hidden & Spy Camera Detector is free to download, with in-app purchases available.
Which has better reviews, CO2 sensor or Hidden & Spy Camera Detector?
Hidden & Spy Camera Detector is rated higher. CO2 sensor averages 3.4 out of 5 from 7 ratings, while Hidden & Spy Camera Detector averages 3.9 from 835 ratings.
Do CO2 sensor or Hidden & Spy Camera Detector have ads?
Hidden & Spy Camera Detector shows ads; CO2 sensor does not.
Which is updated more often, CO2 sensor or Hidden & Spy Camera Detector?
CO2 sensor ships an update every 12 months, and Hidden & Spy Camera Detector every 8 months. Most recently, CO2 sensor was updated on October 24, 2026 and Hidden & Spy Camera Detector on October 30, 2026.

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