Legal
Data deletion
There is no Dram+Vine account to delete, because there isn't one. No registration, no user database, no login. Everything the app holds about you is either on your own phone or in your own Google account, which means deletion is something you do directly rather than something you request.
One bottle
Open the bottle's detail screen and delete it there. That also removes that bottle's photographs and its tasting notes from the device.
Everything on the phone
Either uninstall the app, or go to Android's system settings: Apps → Dram+Vine → Storage → Clear storage. Both erase the whole collection, all photographs, and every setting from the device.
The copies in your Google account
If you connected Google Drive, two things live in your Google account rather than on the developer's servers: label photographs in a folder called "Bottle Photos", and your collection in a spreadsheet called "Bottle Collection".
Deleting a bottle does not delete its photograph from Drive, and neither disconnecting nor uninstalling removes either one. The app requests the narrowest Google permission available, access limited to files it created itself. It has no delete function for Drive files, so it cannot clean them up for you. To remove those copies, delete them yourself in Google Drive.
Withdrawing the Google permission
Disconnect in Settings stops the app using your Google account and clears what it had saved about the connection. It does not withdraw the permission you granted, which continues to exist on Google's side until you remove it, and uninstalling does not do it either.
To withdraw it, go to myaccount.google.com/permissions, find Dram+Vine, and remove its access.
Android's own backup
If Android backup is on in your device settings, your bottle database and app settings are included in it and stored in your own Google account. Turn it off, or clear it, under Settings → Google → Backup.
What the developer holds
Nothing that identifies you. If you have pasted your own Gemini key into Settings, nothing of yours reaches the developer at all, because those requests go straight from your phone to Google. Otherwise the proxy that carries label photographs to Google does not store what you send; it keeps only a technical record of each request, covering the time, size, duration, cost and result, with no photographs, no bottle information, and no address or device details. Requests carry no account or device identifier, so there is no way to find your entries in it, and a deletion request against that log cannot be honoured because nothing connects it to you. That log is capped at the most recent 100,000 requests and older entries drop off as new ones arrive.
Photographs and collection summaries sent for identification are handled by Google under its paid Gemini API terms, which retain content briefly for abuse monitoring and then delete it.
Contact
Questions about any of this: dramvine@gmail.com