Privacy Policy

PromKhai · Last updated: August 11, 2026

PromKhai ("the app") is a point-of-sale app for retail stores that runs entirely on your Android device. The app does not have a server or backend of its own — this policy explains the little data that is involved, most of which never leaves your device.

1. Information we collect

The app collects two kinds of information:

Business data you enter — products, prices, stock quantities, and sales records you create while using the app.
Google account information (only if you choose to use "Sign in with Google") — your name, email address, and profile picture, as provided by Google. We do not request access to your Gmail, Google Drive, contacts, or any other Google service.

2. How we use this information

Business data is used solely to run the point-of-sale features you see in the app — showing your product list, calculating sales, etc.

Your Google profile information (name, email, picture) is used only to show who is currently signed in on the device. We do not use it for advertising, analytics, or any purpose beyond identifying the signed-in user inside the app.

3. Where your data is stored

All data — business data and your cached Google profile — is stored locally on your device (using a local SQLite database and local device storage). Because PromKhai has no server, none of this data is transmitted to us, stored on our infrastructure, or shared with any third party. Uninstalling the app removes all locally stored data.

4. Google Sign-In and Google user data

Sign-in is handled directly through Google's own sign-in service on your device. The app only requests the email and profile scopes to read your basic profile — it does not request or access any other Google service or data on your behalf. Signing out of the app clears the locally cached profile information.

5. Sharing of information

We do not sell, rent, or share your business data or Google profile information with any third party. There is no analytics or advertising SDK in the app.

6. Children's privacy

PromKhai is intended for business use (retail staff and shop owners) and is not directed at children.

7. Changes to this policy

If this policy changes, the "Last updated" date above will be revised accordingly.

8. Contact

Questions about this policy can be sent to wanwansweetdreams@gmail.com.