Bloomberg Reviews the Four

"If screens, menus and apps are too much to deal with first thing in the morning (or ever), the Ratio Four is the way to go. Portland, Oregon-based Ratio was founded in 2012 with the intent of automating the pour-over process in the simplest way possible. Previous models, the Ratio Six and the Ratio Eight, were sleekly designed appliances geared more for brewing by the batch than by the cup.

The smaller-scale Four fills that gap and offers its own design distinctions, like a removable 22-oz water tank that connects to the brewer by a 14- inch-long hose wrapped in a slinky-like matte-black hose and a handblown, smoke-tinted borosilicate glass carafe.

The Ratio’s controls are limited to a single button, with a trio of lights that show the current stage of the brewing process: bloom, brew and then ready. With just that one button, customization options are, unsurprisingly, limited. A long press tells it you’re making a smaller batch of coffee, so it shrinks the bloom cycle appropriately. After that, it pulse-pours water for two minutes before steadily adding the remainder. You can even swap out the brew basket and carafe for your own dripper and mug."

Read the full review.