Updated October 2026
Data from the official Apollo Automation and Aranet sites.
2026 verdict
Aranet4 HOME has the better all-around case than Apollo MSR-2 with CO2 in 2026, starting with screen and alerts.
What pushes it ahead is screen and alerts, and its broader overall balance keeps the advantage from looking narrow. Apollo MSR-2 with CO2 is the better fit only for buyers who prioritize price and sensors above everything else here. That is why the final call still favors Aranet4 HOME.
Works with
Connectivity
- Wi-Fi 2.4 GHz
vs
Winner
Works with
Connectivity
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| Feature | Apollo MSR-2 with CO2 | Aranet4 HOME | Winner |
|---|---|---|---|
| Price | $56.09 | $189.00 | Apollo MSR-2 with CO2 |
| Screen | NO | YES | Aranet4 HOME |
| Sensors | CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy | CO2, Temperature, Humidity, Atmospheric Pressure | Apollo MSR-2 with CO2 |
| Alerts | Temperature Alerts, Air Quality Alerts | Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts | Aranet4 HOME |
| Weather Resistance | NO | NO | Tie |
| Connectivity | 2.4 GHz WiFi | Bluetooth | Tie |
| Integrations | Home Assistant | Home Assistant | Tie |
| Local Control | YES | YES | Tie |
$56.09
- + Price: $56.09
- + Sensors: CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy
- - Screen: NO vs YES
- - Alerts: Temperature Alerts, Air Quality Alerts vs Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts
Winner
$189.00
- + Screen: YES
- + Alerts: Temperature Alerts, Humidity Alerts, Air Quality Alerts, Low Battery Alerts
- - Price: $189.00 vs $56.09
- - Sensors: CO2, Temperature, Humidity, Atmospheric Pressure vs CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy
Frequently Asked Questions
Which is better overall: Apollo MSR-2 with CO2 or Aranet4 HOME?
Aranet4 HOME has the stronger overall profile in this comparison, especially for screen and alerts.
What is the biggest difference between Apollo MSR-2 with CO2 and Aranet4 HOME?
Price is one of the clearest differences: Apollo MSR-2 with CO2 lists $56.09, while Aranet4 HOME lists $189.00.
Which one looks better on price?
Apollo MSR-2 with CO2 is listed at $56.09, while Aranet4 HOME is listed at $189.00. Apollo MSR-2 with CO2 (better spec).
Who should buy Apollo MSR-2 with CO2?
Choose Apollo MSR-2 with CO2 if your priority is price and sensors and that matters more than screen.
Who should buy Aranet4 HOME?
Choose Aranet4 HOME if your priority is screen and alerts and that matters more than price.
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