When you scan a barcode, AlcoLog looks up the product in public alcohol and nutrition databases to auto-fill the ABV (alcohol by volume) and calories. This saves you from typing those values in manually.
Most databases are queried directly from your phone. One database, FatSecret, cannot be called directly from a phone for technical reasons, so Premium users' scans are sent through our server, which queries FatSecret on your behalf and returns the result.
What we don't do: we don't log which barcodes you've personally scanned, and we don't link scans to your account or device. The server keeps a short-lived cache of barcode to product data (to save our own quota with FatSecret), but it contains no user identifier of any kind.
What happens when a product isn't found: some alcoholic drinks aren't yet in any public database, especially smaller regional or craft brands. When that happens, the app shows you the product name we did find (if any) and lets you type in the ABV once. Your entry is saved locally on your device only, so the next time you scan the same product it auto-fills instantly without another lookup.
For full details on which databases are queried, see the
Privacy Policy.