Privacy Policy — VầnVui

Effective date: June 27, 2026

App: VầnVui — Vietnamese phonics learning for kids (com.vanvui.app)

Developer: Smallsoft

Contact: smallsoft.work@gmail.com

VầnVui is an educational app for children (ages 3–6). We take children's privacy seriously and comply with the Google Play Families policy, COPPA, and GDPR-K. The app has no ads, does not collect personal identifiers from children, and does not sell or share data for advertising.

1. Learning content is free

All learning content is completely free. The app only sells cosmetic items (Fox costumes) and an early block-unlock feature through in-app purchases (see §4), always behind a parental gate (a simple math question).

2. Data we collect

We do not require sign-in, do not collect users' email/phone, do not collect precise location, and do not use an Advertising ID (disabled).

Data typePurpose
Anonymous usage data (screens viewed, lesson start/complete, shop opens, purchase events) + app version, device model, OS, language, and an app instance ID Understand how children use the app to improve the learning experience
Crash data (error logs, device state, stack traces) Detect and fix technical issues
Purchase history (which items/blocks were bought + an anonymous user id) Restore purchases and process transactions
Child's nickname (if a parent enters one) — stored on the device only, never transmitted Show a greeting in the app
Microphone voice — processed on-device, not recorded, stored, or transmitted Recognize the child reading rhymes (pronunciation practice)

Analytics and crash data are collected in an anonymous/pseudonymous form, are not linked to a child's identity, and are not used for personalized advertising (ad personalization signals are disabled).

3. Device permissions

4. In-app purchases

Purchases are processed by the app store's secure billing system; all card/payment details are handled by the store — we never receive or store card data. We use a purchase-management service only to restore and verify purchases (it stores a transaction id and an anonymous user id). Every purchase goes through a parental gate.

5. Service providers

We use a small number of third-party providers solely as our technical processors — for anonymous analytics, crash reporting, and purchase management. They act on our instructions and are not permitted to use children's data for their own purposes.

6. Children's privacy

The app is directed to children. We do not knowingly collect children's personal identifiers, show no ads, and do not let children communicate with strangers or open external links without a parental gate. Any spending requires parental confirmation.

7. Sharing & selling

We do not sell and do not share personal data with third parties for advertising or marketing.

8. Storage & security

Analytics/crash data is stored in our providers' secure infrastructure for their default retention periods. On-device data (nickname, learning progress, items) stays in the app's storage on the device.

9. Parental rights

10. Changes to this policy

When we update this policy we will change the effective date above and, for material changes, notify you in-app or on the store listing.

11. Contact

Any privacy questions: smallsoft.work@gmail.com