CO2 sensor vs Cacophony Sidekick
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
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.
- 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
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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
Cacophony Sidekick
This application allows users to remotely monitor and protect wildlife by connecting to thermal and IR cameras in remote locations. It enables configuration of devices, playback of audio, and network connections. Users can view and tag captured videos on a website, receiving real-time data and alerts for conservation efforts.
- Remote camera connection
- Wildlife monitoring
- Device configuration
- Real-time data and alerts
- Video tagging
- Open-source
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Cacophony Project's iOS app connects to thermal and IR cameras in remote locations, allowing users to gather events and recordings to monitor and protect wildlife. The app is used to remotely configure and manage the devices, including location, playing audio, and connecting to networks. Videos captured by the devices are uploaded to a website where users can view and tag the footage. The app is open-source and designed to be user-friendly, providing real-time data and alerts to ensure effective conservation efforts.
Screenshots
Verdict
The clearest difference is update cadence: Cacophony Sidekick at every 2 months against CO2 sensor's every 18 months. On price, ads, in-app purchases and monetization model 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
Both are free to download. Neither carries in-app purchases, so what you see is what you pay.
CO2 sensor ships an update every 18 months, Cacophony Sidekick every 2 months. The most recent releases landed on September 16, 2026 and June 8, 2026 respectively.
| Parameter | CO2 sensor | Cacophony Sidekick |
|---|---|---|
| Price | Free | Free |
| Rating | 2.7 (3 ratings) — better | — |
| Positive reviews | — | 100.0% of reviews |
| Number of ratings | 3 — better | — |
| Update frequency | Every 18 months | Every 2 months — better |
| Ads | No | No |
| In-app purchases | No | No |
| Monetization | Free | Free |
| Devices | iPhone, iPad, iPod, Mac — better | iPhone, iPad, iPod |
| Requires iOS | 15.6 | 15.6 |
| Further details — not scored | ||
| Size | 0 MB | 37 MB |
| Age rating | 4+ | 4+ |
| Developer | sighmon | THE CACOPHONY PROJECT LIMITED |
Customer experience
CO2 sensor
Cacophony Sidekick
In-app purchases
CO2 sensor
No in-app purchases
Cacophony Sidekick
No in-app purchases
Questions
Is CO2 sensor free?
Is Cacophony Sidekick free?
Do CO2 sensor or Cacophony Sidekick have ads?
Which is updated more often, CO2 sensor or Cacophony Sidekick?
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