This app was mentioned in 2 comments, with an average of 2.50 upvotes
My Cocktail Recipes Calendar app lets you switch to metric (centiliters) FWIW. If you end up using it, PM me and I'll give you the easter egg code to remove ads. That offer extends to other r/cocktails folks as well.
Here's a weird little app I made last Fall.
<strong>Cocktail Recipes Calendar</strong>
It's based on a calendar, in that it shows you a new cocktail and its recipe every day of the year. It also has a widget you can plop down on your home screen to show you the day's cocktail.
The app is mostly geared toward the "Cocktail Curious" -- so for people who occasionally order a martini or whatever, but want to branch out and find another drink or two they might like to order at a bar or make at home.
It has a basic search function and sharing capability, and you can switch between U.S. and metric systems for the recipes in the app Settings.
Check it out if it sounds interesting!