Amazon Smart Air Quality Monitor vs Apollo MSR-2 with CO2

Updated April 2026

Data from Amazon and official Apollo Automation site.

2026 verdict

Across the full comparison in 2026, Apollo MSR-2 with CO2 earns the nod. It has the clearer edge on price, sensors, and alerts, and it stays ahead on its broader overall balance. Choose Amazon Smart Air Quality Monitor only if connectivity matters more to you than the broader advantage from Apollo MSR-2 with CO2. For the average buyer, Apollo MSR-2 with CO2 is the safer choice.

Amazon Smart Air Quality Monitor

$69.99

Winner

$56.09

Feature	Amazon Smart Air Quality Monitor	Apollo MSR-2 with CO2	Winner
Price	$69.99	$56.09	Apollo MSR-2 with CO2
Connectivity	2.4 GHz Wifi, Bluetooth	2.4 GHz Wifi	Amazon Smart Air Quality Monitor
Sensors	TVOC, PM2.5, CO, Temperature, Humidity	CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy	Apollo MSR-2 with CO2
Alerts	Air Quality Alerts	Temperature Alerts, Air Quality Alerts	Apollo MSR-2 with CO2
Weather Resistance	NO	NO	Tie
Screen	NO	NO	Tie
Integrations	Alexa	Home Assistant	Tie

$69.99

+ Connectivity: 2.4 GHz Wifi, Bluetooth
- Price: $69.99 vs $56.09
- Sensors: TVOC, PM2.5, CO, Temperature, Humidity vs CO2, Temperature, Atmospheric Pressure, Ambient Light, UV, Occupancy

Winner

$56.09

Which is better overall: Amazon Smart Air Quality Monitor or Apollo MSR-2 with CO2?: Apollo MSR-2 with CO2 has the stronger overall profile in this comparison, especially for price, sensors, and alerts.
What is the biggest difference between Amazon Smart Air Quality Monitor and Apollo MSR-2 with CO2?: Price is one of the clearest differences: Amazon Smart Air Quality Monitor lists $69.99, while Apollo MSR-2 with CO2 lists $56.09.
Which one looks better on price?: Amazon Smart Air Quality Monitor is listed at $69.99, while Apollo MSR-2 with CO2 is listed at $56.09. Apollo MSR-2 with CO2 (better spec).
Who should buy Amazon Smart Air Quality Monitor?: Choose Amazon Smart Air Quality Monitor if your priority is connectivity and that matters more than price.
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 connectivity.