Melto: A Smart Scent Diffuser by Geonwoo Kang

South Korean product designer Geonwoo Kang, whose SETIME tape measure timer we featured earlier this year, is back with Melto, a smart wax melter that lets users mix their own scent combinations through a simple, hands-on interface.

The premise is simple but clever. Under a removable lid you’ll find three segmented trays, each loaded with a different scented wax puck. A rotary dial on the front panel cycles between single, dual and triple modes, melting one, two, or all three wax pieces at once so users can create a custom scent blend on demand. Below it, physical buttons control the heat level, with a small LED indicator showing the current setting. The whole interface has a deliberate tactile, appliance-like quality, with simple icons, soft grey details and a bright orange control point that gives the device its strongest visual cue.

A side slider activates the built-in mood light, raising the inner LED to create an adjustable glow around the top of the diffuser. Overall, it’s another ingenious concept by Geonwoo, turning a basic home fragrance device into a more personal, playful ritual.

More product design Geonwoo Kang’s portfolio