Comparison

CO2 sensor vs Find Hidden

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
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

Find Hidden

This app helps you detect suspicious electronic devices on your network. It scans your environment in real-time to identify connected devices, distinguishing between safe and potentially hidden ones. Protect your privacy in new locations or while traveling.

Highlights
  • Detect suspicious peripherals
  • Inspect spy device information
  • Scan all connected electronic devices
  • Real-time network updates
  • Distinguish safe and suspicious devices
  • Anti sneak shot guide
Features
Read full description

Find Hidden aids you to find out suspicious peripherals and inspect the details information for spy devices. Detect all electronic devices in the network environment, updating in real-time as you move around so as to protect your privacy and security when you move to a new home, travel on business, or go on honeymoon. Key Features: Displays all connected devices. Wi-Fi Device Inspection for discovering lost devices. Distinguish both safe devices and suspicious devices. Anti sneak shot guide and simplicity of operator. Subscription Information: There are two types of subscriptions to Inspector Eye Premium. The duration of the subscription can be a year: $13.99 or a lifetime: $16.99 - Payments will be credited to your iTunes account upon confirmation of purchase. - Subscription automatically renews if automatic renewal is not turned off at least 24 hours before the end of the current period. - Accounts will be charged for renewal within 24 hours before the end of the current period and determine the cost of renewal. - Subscriptions can be managed by the user, and automatic updating can be disabled by going to the user account settings after purchasing Terms of Use: https://sites.google.com/view/inspectoreyetou/home Privacy Policy: https://sites.google.com/view/inspectoreyepp/home

Screenshots

CO2 sensor4 screens
Find Hidden4 screens

Verdict

The call

The clearest difference is rating: Find Hidden at 4.4 against CO2 sensor's 2.7. Find Hidden also leads on update cadence (monthly vs every 18 months) and ratings volume (341 vs 3). CO2 sensor's advantage is in-app purchases (none vs 2) and device support (4 vs 2). On price and ads 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. Find Hidden sells 2 in-app purchases, starting at $9.99 per month. CO2 sensor asks for nothing beyond the download.

ReceptionRating · Positive reviews · Number of ratings

Find Hidden holds the better App Store score, 4.4 against 2.7. That said, the two scores are not equally well evidenced: Find Hidden has 341 ratings behind it against 3, so its average is the more settled of the two.

UpkeepUpdate frequency

CO2 sensor ships an update every 18 months, Find Hidden monthly. The most recent releases landed on September 16, 2026 and September 25, 2026 respectively.

Scorecard7 real differences · 3 level
CO2 sensor versus Find Hidden: the parameters behind the verdict, then further details
ParameterCO2 sensorFind Hidden
PriceFreeFree
Rating2.7 (3 ratings)4.4 (341 ratings) — better
Positive reviews—26.1% of reviews
Number of ratings3341 — better
Update frequencyEvery 18 monthsMonthly — better
AdsNoNo
In-app purchasesNo — betterYes
MonetizationFree — betterSubscription
DevicesiPhone, iPad, iPod, Mac — betteriPhone, iPod
Requires iOS15.613.4 — better
Further details — not scored
Size0 MB21 MB
Age rating4+4+
Developersighmon安帮 潘

Customer experience

CO2 sensor

All ratings3 ratings
Positive33.3%
Neutral33.3%
Negative33.3%

Find Hidden

All ratings341 ratings
Positive82.1%
Neutral7.9%
Negative10.0%
Written reviews23 reviews
Positive26.1%
Neutral8.7%
Negative65.2%

Bugs and requests

CO2 sensor

Not enough reviews yet to summarise bugs or requests.

Find Hidden

Reported bugs

4 issues
  • App closes when clicking ping details
  • Inaccurate device counts (fluctuates)
  • Doesn't show location
  • Shows only IP numbers

Requested features

7 requests
  • Precise location of the object
  • Application in Spanish
  • Clearer defined mapping
  • Free for those with stalkers
  • Check for wireless IPs (free alternative)
Show 2 more
  • Show where the device is
  • Show when the device was hooked up

In-app purchases

None

CO2 sensor

No in-app purchases

2 purchases

Find Hidden

Subscriptions2
  • Hidden Inspector Pro Month$9.991 Month
  • Find Hidden Premium Year$14.991 Year

Questions

Is CO2 sensor free?
CO2 sensor is free to download, with no in-app purchases.
Is Find Hidden free?
Find Hidden is free to download, with in-app purchases available.
Which has better reviews, CO2 sensor or Find Hidden?
Find Hidden is rated higher. CO2 sensor averages 2.7 out of 5 from 3 ratings, while Find Hidden averages 4.4 from 341 ratings.
Do CO2 sensor or Find Hidden have ads?
Neither CO2 sensor nor Find Hidden shows ads.
Which is updated more often, CO2 sensor or Find Hidden?
CO2 sensor ships an update every 18 months, and Find Hidden monthly. Most recently, CO2 sensor was updated on September 16, 2026 and Find Hidden on September 25, 2026.

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