Your kitchen
Batch log
Every page here tells you to label the jar. This is where the label comes from. Log what you made, choose which batch the recipes scale to, and print something to tape to the lid.
Nothing logged yet.
Every jar you make can live here.
Log a batch and the site scales every recipe to it, remembers what you made after you have forgotten, and prints a label for the jar. Nothing leaves this browser.
Where this is kept
In this browser, on this device. There is no account and nothing is sent anywhere, which also means a batch logged on your laptop will not appear on your phone, and clearing your browsing data clears this too. For a handful of facts about jars in your fridge, that seemed like the right trade — but print the labels rather than relying on this as the only copy.
Not sure how strong a batch is? Work it out from your flower or from a concentrate, then log the range it gives you.