One variable for the next brew
Taste is preference, not a defect code. The coach separates strength from extraction only where the selected evidence permits.
Next controlled change
Direction unclear
Strength is the concentration measured as TDS; extraction yield combines beverage mass, TDS and dose. Current SCA Brewing Chart research also shows that sensory attributes do not fit one universal sour/under or bitter/over zone. The coach is a transparent preference heuristic, not a diagnosis.
If symptoms oppose each other, CupTune asks for another controlled brew instead of manufacturing a confident adjustment.
No. Recipes, timer state, bean details, measurements and notes stay in this browser unless you explicitly export a file.
No. It keeps measurements comparable and suggests one controlled change; taste remains your preference.
After one successful load, the application shell and authored routes are cached. Advertising, analytics and email links can be unavailable without blocking the tools.
Extraction yield needs a measured dissolved-solids value. CupTune will not invent one from roast, colour, method or taste.