SakeTwin Privacy Policy

Effective date: September 1, 2026

SMAGAI, LLC. ("we", "us") sets out this Privacy Policy ("this Policy") to explain how we handle your information in the application "SakeTwin" ("the App"). This English version is a translation of the Japanese Privacy Policy. If the two differ, the Japanese version prevails.

1. Information we collect

The App handles the following information.

Type	Description	When it is collected
Email address	Used for registration and sign-in	At registration
Account identifier	A code that identifies you on your device and on our servers	At registration, or when you start as a guest
Photos of candidate sake	Sent to read sake names from menus and bottles	When you select or take a photo
Conversation	What you and Tomoshibi, the AI sake sommelier, say to each other	When you chat
Tasting notes and feedback	How the sake you drank tasted, and any free-text notes	When you record a tasting
Taste preferences	Your taste preferences, learned from conversation and tasting notes	Continuously while you use the App

The App does not include any SDK for advertising or usage analytics (including analytics and crash-reporting tools). We do not track you by combining your activity with data from other companies' services.

2. How we use your information

We use the information only for the following purposes.

Registering and signing you in, and managing your account
Providing conversation and sake recommendations by Tomoshibi
Reading sake names from photos (menu and bottle scanning)
Learning your taste and improving the accuracy of recommendations
Synchronising your data across devices
Responding to your enquiries

3. Sharing with and processing by third parties

The App processes data using the following services, both provided by Google. Data is handled under their respective terms of service and privacy policies.

Google Firebase (authentication, database and server functions): used to store your account information, taste preferences and tasting notes.
Google Gemini API: processes the photos and conversation you send in order to read menus and bottles and to generate Tomoshibi's replies. Photos and conversations are not stored on our servers. They are sent with each request and used only to generate the response.

We do not sell or provide your information to any other third party, and we do not provide data to advertisers.

4. Using the App without an account

You can chat, add candidate bottles and receive recommendations without registering. Without an account, recording tastings, learning your taste and synchronising across devices are not available. In that case your conversation and candidates are stored only on your device and are not sent to our servers (except when photos and messages are sent to Tomoshibi to answer you).

5. Deleting your account

You can delete your account at any time from the Account screen in the App. When you do:

Your member information and personal taste preferences are deleted.
The raw tasting notes you recorded are kept after being processed so that they can no longer be linked to any individual, in order to improve the accuracy of our sake taste data. You cannot be identified from this information after deletion.
The taste data of each sake itself (trends by brand and serving temperature), which reflects the tasting notes you recorded, is shared with other users and is therefore kept as it is. It contains no personal information about you.

6. Retention

Account information from registration is kept for as long as the account exists. After deletion, data is handled as described in the previous section.

7. Your rights

You may ask us to disclose, correct or delete your information. You can delete your account within the App. For any other request, please contact us at the address below.

8. Age requirement

The App deals with sake, an alcoholic beverage. In addition to the App Store age rating (18+), the App asks you on first launch to confirm that you are of legal drinking age in your country of residence. The App is not intended for anyone below the legal drinking age.

9. Changes to this Policy

We may change this Policy without notice in response to changes in law or in the service. We will announce important changes within the App.

10. Contact

For questions about this Policy, please contact:

SMAGAI, LLC.
Email: support@smagai.com

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