No account as a product decision
The journal is local because bean notes and taste ratings do not need a remote identity. You can use every core tool without signing in, uploading a recipe or accepting advertising.
Repeatability over authority
CupTune does not score a brewer or claim one cup is objectively correct. It helps make a repeatable plan, record the outcome and isolate the next change.
What is deliberately absent
No cloud sync, Bluetooth control, photo analysis, push notifications or artificial-intelligence diagnosis exists in this release. Those features would expand the data and reliability boundary without improving the core loop.
Support
For arithmetic errors, accessibility problems or recipe corrections, write to support@cuptune.com. Do not attach a private journal export.