Meet GINA: a smart coffee maker with a built-in scale and app that lets you prepare pour-over, immersion and cold drip coffee like a pro. It connects to your phone via Bluetooth and lets you use the scale to find the perfect coffee/water ratio.
GINA is compatible with iOS and android devices. The app includes a drop meter for cold brewing. It tracks the whole brewing process. The battery lasts up to 80 hours.