Just like sound and light, your environment's scent is essential in making you feel relaxed, happy, or excited. That's why there are entire industries built around making your home smell nice. Sprays, candles, gels, battery-powered air fresheners, aromatherapy scent diffusers, you name it, there are thousands of choices for it. But smart, or to be more pedantic, connected fragrance diffusers are a new market altogether. Until recently, the options were limited — Aera, Marie by Elica — but other brands are coming into the picture now. Moodo is one of them. It promises to let you "DJ" the aroma, mixing various fragrances in any way and proportion you want.

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