Aqara Presence Sensor FP2 vs Apollo Automation MSR-2

The Aqara FP2 is the stronger pick for most homes: it tracks up to 5 people, splits a room into up to 30 zones, adds fall detection when ceiling-mounted, and works natively with HomeKit, Alexa, Google Home and Matter. The Apollo MSR-2 is a maker's sensor: single-target radar plus real environmental sensing (CO2, LUX/UV, temperature, pressure) and an RGB LED and buzzer, all tuned through Home Assistant YAML. Build-wise the FP2 is IPX5-rated plastic for wall or ceiling mounting; the MSR-2 is a small cased ESP32 board meant for indoor tinkering. Reviewers of both praise accuracy and Home Assistant integration; FP2 owners report occasional few-second delays, and MSR-2 owners value the configurability but must accept single-target tracking.

• Choose the Aqara Presence Sensor FP2 if you want multi-person zone tracking, fall detection and native HomeKit, Alexa and Google support without writing config.
• Choose the Apollo Automation MSR-2 if you run Home Assistant, want CO2, light, UV, temperature and pressure readings from one device, and don't mind YAML setup.