I use GINA for my pour over coffee every morning. I find it to be the most handy and complete coffee tool out there. Plus the app makes it a great place to see what other coffees the community is drinking and experimenting with. Love it.
GINA is an award-winning smart coffee instrument. With a precision valve to control the drip, an integrated precision scale, and a dedicated brewing app, it enables you to brew coffee with pour-over, immersion, and cold drip methods. Oh, and it even makes tea!