Calibrew: Coffee Dial-In

Calibrew is a dial-in coach for home coffee. You brew, tap how the cup tasted, and it changes one thing for the next cup. Since only one thing moves between cups, you can tell what made the difference. YOUR MACHINE Calibrew starts with what you brew on. The change it suggests depends on the machine: • On a bean-to-cup machine it moves the grind one setting at a time, only while the grinder runs, and waits for the third cup to judge it. After the grind comes strength, then cup size. • With a pressurised basket the grind barely shows in the cup, so it changes the dose. • On a lever or hand pump, your kettle sets the temperature and the way you pull does the pre-infusion. • On a heat exchanger it asks for a cooling flush before it blames the grinder for a bitter shot. • With a dual boiler or pressure profiling, it can also change the temperature and the peak pressure. • For filter and…