Does CupTune upload my brew journal?
No. Recipes, timer state, bean details, measurements and notes stay in this browser unless you explicitly export a file.
Private evidence, not cloud history
Coffee brew journal
A record snapshots the recipe and actual measurements so later edits cannot rewrite what happened.
Compare attempts
Only changed variables are highlighted
| Select | When | Method | Bean | Ratio | Time | Rating |
|---|---|---|---|---|---|---|
| No records yet. | ||||||
Questions before the next brew
Does CupTune decide whether coffee tastes correct?
No. It keeps measurements comparable and suggests one controlled change; taste remains your preference.
Can I use the tools offline?
After one successful load, the application shell and authored routes are cached. Advertising, analytics and email links can be unavailable without blocking the tools.
Why does extraction yield require TDS?
Extraction yield needs a measured dissolved-solids value. CupTune will not invent one from roast, colour, method or taste.