This $50 gadget tests your air quality for allergens, pollutants and harmful smoke – as a home tech editor, it's a must-have for all

Large, open living room with ornate fireplace, two large doorways, a patterned rug, a green sofa,a gray sofa, two chairs and abstract art on the wall, on wooden floor with white walls and ceiling.

We often think of air pollution as something that exists outside, but in reality, the air inside our homes can be just as polluted. Cooking, cleaning and living with pets can all contribute to poor indoor air quality that can affect our health and comfort.

That's where air quality monitors come in. These small devices offer real-time insight into what we're breathing at home, air quality, and ventilation – and ultimately improve our wellbeing.