monitorCat vs Luxafor CO2
Price, ratings, monetisation and update history for both apps, side by side — with what reviewers say about each.
monitorCat
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A lot of smoke/CO detector can NOT send internet notification other than generating loud or pitch noise alarm, the App use your smart phone to listen to the alarm and send real time gmail notification, by which, we extend life to our old smart phone to be as wireless assistant, what's more, we don't have to buy expensive wireless smoke/CO detector and pay monthly fee, the App is free!
Luxafor CO2
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The Luxafor CO2 Dongle app allows you to monitor your environment and gather data about the air quality over time. So you can track your CO2 levels, air temperature, and humidity remotely. If you want to share your date data with friends, family members or teammates, just send an invite to allow them access data instantly. Also, you can customize each Luxafor CO2 Dongle's name and description to manage Dongle data flows and locations.
Screenshots
Verdict
The clearest difference is update cadence: monitorCat at fortnightly against Luxafor CO2's every 2 months. monitorCat also leads on iOS requirement (8.0 vs 14.0). On price, ads, in-app purchases and device support 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.
monitorCat ships an update fortnightly, Luxafor CO2 every 2 months. The most recent releases landed on October 12, 2026 and October 5, 2026 respectively.
| Parameter | monitorCat | Luxafor CO2 |
|---|---|---|
| Price | Free | Free |
| Update frequency | Fortnightly — better | Every 2 months |
| Ads | No | No |
| In-app purchases | No | No |
| Devices | iPhone, iPad, iPod | iPhone, iPad, iPod |
| Requires iOS | 8.0 — better | 14.0 |
| Further details — not scored | ||
| Size | 8 MB | 54 MB |
| Age rating | 4+ | 4+ |
| Developer | Wei Zhao | Greynut LTD |
In-app purchases
monitorCat
No in-app purchases
Luxafor CO2
No in-app purchases
