Effective June 6, 2026 · Last updated June 6, 2026
This Privacy Policy explains how Tran Bao Toan ("I", "me", "my"), the individual developer of Yena, collects, uses, and protects your information when you use the Yena mobile application ("App"). By using the App, you agree to the practices described below.
Yena is developed and operated by Tran Bao Toan, an individual developer based in Ho Chi Minh City, Vietnam.
Contact: baotoan.work@gmail.com Address: BS15, Vinhomes Grand Park, Phuong Long Binh, Ho Chi Minh City, Vietnam
When you create an account, you provide:
When you use the App, we automatically collect:
Your current subscription plan and status are managed by Apple and RevenueCat. We receive your subscription status to unlock the appropriate features. We do not store or have access to your payment card details.
When you sign in with Google or Apple, we receive your name and email address as permitted by your authorisation with those providers. We do not receive your passwords.
We use your information to:
We do not sell your personal information to any third party.
Yena uses AI to generate and personalise the knowledge content you see each day. To do this, your onboarding preferences, topic interests, and reading history are sent to third-party AI services running on our backend.
We share your information only in the following limited circumstances:
We use trusted third-party services to operate the App. Each provider has access only to the data necessary for their specific function and is required to protect it:
| Provider | Purpose |
|---|---|
| Firebase Authentication | Sign-in and account management |
| Firebase Cloud Messaging | Push notifications |
| Firebase Storage | User-uploaded files (e.g. profile photos) |
| RevenueCat | Subscription management and plan status |
| Third-party AI services | Personalised content generation |
| AWS (Virginia, USA) | Cloud hosting and data storage |
We may disclose your information if required by applicable law, regulation, court order, or government request, or to protect the rights, property, or safety of users or the public.
If the App is acquired, merged, or transferred, your information may be part of that transaction. You will be notified before your data becomes subject to a different privacy policy.
We may share your information for any other purpose only with your explicit prior consent.
Your data is stored on AWS servers in Virginia, USA (us-east-1). We implement industry-standard security measures, including:
No method of transmission over the internet is entirely secure. While we take commercially reasonable precautions, we cannot guarantee absolute security. In the event of a breach affecting your rights, we will notify you as required by applicable law.
We retain your personal information for as long as your account remains active or as needed to provide the service. You may request deletion of your account and all associated data at any time via Settings → Danger Zone → Delete Account, or by contacting us at baotoan.work@gmail.com.
We may retain certain data for a limited period thereafter to comply with legal obligations, resolve disputes, or enforce our agreements.
Depending on where you live, you may have the following rights:
All users:
EU / EEA users (GDPR):
California users (CCPA):
To exercise any of these rights, contact us at baotoan.work@gmail.com. We will respond within 30 days.
If you are located in the EU or EEA, we process your personal data on the following legal bases:
| Processing Activity | Legal Basis |
|---|---|
| Account creation and authentication | Contract performance |
| Personalised content delivery | Legitimate interest |
| Push notifications | Consent |
| Subscription management | Contract performance |
| Security and fraud prevention | Legitimate interest / Legal obligation |
| Crash reporting and service improvement | Legitimate interest |
Yena is intended for users aged 13 and older. We do not knowingly collect personal information from children under 13. If we discover that a child under 13 has provided us with personal data without verifiable parental consent, we will delete it promptly. If you believe we have inadvertently collected such information, please contact us immediately at baotoan.work@gmail.com.
The App integrates with the following third-party services, each governed by their own privacy policies:
We encourage you to review these policies. We are not responsible for the privacy practices of any third-party service.
Your data is stored and processed in the United States (AWS Virginia). If you are located in the EU or another jurisdiction with data transfer restrictions, by using the App you acknowledge this transfer. We take steps to ensure your data is protected in a manner consistent with applicable law.
We may update this Privacy Policy from time to time. We will update the "Last Updated" date at the top of this page. For significant changes, we will provide in-app notice. Continued use of the App after changes take effect constitutes your acceptance of the updated policy.
If you have any questions, concerns, or requests regarding this Privacy Policy:
Email: baotoan.work@gmail.com Developer: Tran Bao Toan Address: BS15, Vinhomes Grand Park, Phuong Long Binh, Ho Chi Minh City, Vietnam