Privacy Policy

1. What this policy covers

This policy explains how Hide NB Studio accesses, uses, stores and shares data obtained through Google APIs. The app is operated by Hidenobu Nagai for his own personal use and for a small number of people he knows personally. It is not a commercial service.

2. Google user data the app accesses

The app acts on the Google Account that authorized it. It requests these Google OAuth scopes:

• openid
• email
• profile

Concretely, this gives it access to:

• Email address, name and profile picture URL of the signed-in Google Account
• Whether that email address has been verified

3. How the data is used

The email, name and picture are read only to sign the person in and to check the email against the family allow list.

4. Storage and retention

• Generated images are kept in the browser's own IndexedDB store (the newest 50 only); they are not uploaded for storage
• On the server, only a short-lived in-memory cache of generated images, plus application logs
• There is no database

5. Sharing and disclosure

The app does not sell, rent or trade Google user data, and it does not transfer it to anyone except the services listed below, which are the technical providers the app depends on.

• Google Gemini API — The uploaded photos and the prompts, to generate the images.
• Google Sign-In — The sign-in request and the returned account identity.
• Vercel — Traffic to the app, aggregated cookie-less analytics, and function logs that record the signed-in email as a user identifier.
• Google Tag Manager — Page-view events.

No Google user data is used for advertising or re-targeting, and none of it is used to determine creditworthiness or for lending purposes.

6. Limited Use

7. Who can see the data

The person who signed in and the operator. No one else reads it; it is not made public and it is not shared with other users of the app.

8. Security

• The app runs under a Google Account with the authorizations that the owner granted.
• Credentials and API keys are kept in server-side secret storage or Google-managed storage, never in public files.
• Network requests are made over HTTPS.

9. Revoking access and deleting data

• Revoke the app's access at any time at myaccount.google.com/permissions. The app stops working immediately afterwards.
• Delete the app's data in the app itself, or in the storage listed in section 4.
• Data the app stored inside a Google Account is deleted by deleting it there; there is no separate copy held by the operator.

10. Changes to this policy

If the app's data handling changes, this page is updated and the "Last updated" date above changes with it. The current version is always this page.

11. Contact

Operated by Hidenobu Nagai. The support address for the app is set as the support address on the app's OAuth consent screen. You can also reach the operator through https://github.com/hidenobunagai.