Apollo MSR-2 with CO2 vs Aranet4 HOME

Updated April 2026

Data from Amazon and official Apollo Automation and Aranet sites.

2026 verdict

For this 2026 head-to-head, Aranet4 HOME has the better all-around case. 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.

Apollo Automation

Apollo MSR-2 with CO2

$56.09

BUY NOW

Winner

Aranet

Aranet4 HOME

5% OFF

$199.99

$189.00

BUY NOW

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	Aranet4 HOME
Weather Resistance	NO	NO	Tie
Connectivity	2.4 GHz Wifi	Bluetooth	Tie
Integrations	Home Assistant	Home Assistant	Tie

Apollo Automation

Apollo MSR-2 with CO2

$56.09

BUY NOW

+ 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

Winner

Aranet

Aranet4 HOME

5% OFF

$199.99

$189.00

BUY NOW

+ Screen: YES
+ Alerts: Temperature Alerts, Humidity Alerts, Air Quality 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 (FAQ)

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.