A coffee log that keeps its numbers honest. If something is wrong, or a number looks like it is lying to you, please say so.
Email otozyilmaz@gmail.com. Tell me what you did, what happened, and what you expected instead. If it is about a specific coffee or brew, the date is usually enough for me to work out the rest.
Everything lives on your device and in your own private iCloud database. Settings shows which of the two is in use — if you are not signed into iCloud, nothing is being backed up, and the app says so rather than letting you assume.
Settings also has Backup, which writes one file containing every coffee, brew, recipe, photo and video. Send that file with a bug report only if you are comfortable doing so; it is your whole log.
Sharing your taste profile, and sharing which coffees you rated, each have their own switch in Settings → Share ratings. Both are off unless you switch them on, and you can delete what you have shared at any time from the same screen. The privacy policy explains exactly what is sent.
Why does a rating not change my taste profile? A profile needs five rated coffees before it means anything, and the app tells you how many more it needs rather than guessing early.
Why is the app in the wrong language? Settings → Language changes most text right away. Some dates and numbers, and iOS's own share sheet, photo picker and permission alerts, follow the next time you open CoffeeLab.
My brews aren't on my other iPhone or iPad. Both need to be signed into the same iCloud account, with iCloud on for CoffeeLab (iOS Settings → your name → iCloud). CoffeeLab's own Settings shows whether it is syncing.
My prediction seems wrong. It is an estimate from your own ratings, with a range attached. If the range is wide, there is not much of your history behind it yet. The Lab tab shows how close past predictions have landed.