Angelcare AC337

Why We Like It

Angelcare has been a trusted name in infant breathing monitoring since the 1990s. The AC337 combines an under-mattress movement sensor with a full video monitor — reassurance without attaching anything to your baby. At $130, it offers meaningful peace of mind at a fraction of the Owlet's cost, though it detects motion rather than oxygen levels.

Pros & Cons

Pros

• Under-mattress sensor pad detects breathing movement without touching baby
• Sounds alarm if no movement detected for 20 seconds
• Full video monitor with night vision and two-way audio included

Cons

• Movement sensor only — does not track heart rate or SpO2
• Sensor pad must fit snugly; may not work with all crib mattresses

Score Breakdown

Monitors were evaluated on monitoring accuracy and alert responsiveness, ease of setup and comfort, battery life and durability, app features and data quality, and value.