Last updated: May 5, 2026

Deltabook ("we", "us", or "our") respects your privacy and is committed to protecting your personal information. This Privacy Policy explains how we collect, use, store, and share your information when you use the Deltabook mobile application and related services (the "App").

We may collect the following categories of information:

Account Information: Name, email address, password (encrypted), and profile details you provide when creating or updating your account.

Learning Data: Quiz attempts, quiz scores, lesson progress, achievements, and related in-app learning activity.

Subscription and Purchase Data: Subscription status, entitlement status, and transaction identifiers received through service providers (for example, RevenueCat, Apple App Store, or Google Play).

Social Login Data: Basic profile and identity information when you sign in via supported third-party providers (such as Google or Apple), based on permissions granted.

Device and Log Data: Device model, operating system, app version, language, time zone, IP address, and diagnostic/server log information.

Notification Data: Push notification token and interaction data if you enable notifications.

Support Data: Information you share when contacting us for support, feedback, or inquiries.

We use your information to:

Create, authenticate, and manage user accounts.

Provide core app functionality, including courses, quizzes, achievements, and progress tracking.

Process and validate subscriptions and access rights.

Send important service messages, account updates, and app notifications.

Improve app performance, quality, and user experience.

Monitor, detect, and prevent fraud, abuse, and unauthorized activity.

Comply with legal obligations and enforce our terms and policies.

We do not sell your personal information. We may share information only in the following cases:

Service Providers: With trusted vendors that help operate the App (for example hosting, analytics, authentication, subscription handling, push delivery, and customer support).

Legal Requirements: When disclosure is required by law, court order, legal process, or regulatory request.

Protection of Rights: When necessary to protect rights, safety, security, property, or to investigate violations.

Business Transfers: In connection with a merger, acquisition, financing, or sale of all/part of business assets, subject to applicable protections.

The App may contain links or integrations with third-party services. Information processed by those services is governed by their own privacy policies and terms, not this Privacy Policy.

We use reasonable administrative, technical, and organizational safeguards to protect your personal information. However, no electronic transmission or storage system is fully secure, and we cannot guarantee absolute security.

We retain personal information only as long as needed to provide the App, maintain legitimate business records, resolve disputes, enforce agreements, and meet legal obligations. Data may be deleted or anonymized when no longer required.

Deltabook is not intended for children under 13, and we do not knowingly collect personal information from children under 13. If you believe a child has submitted personal information, please contact us so we can remove it.

Depending on your location and applicable law, you may have rights to:

Access personal information we hold about you.

Request correction of inaccurate information.

Request deletion of your personal information.

Object to or restrict certain data processing.

Withdraw consent where processing is based on consent.

To exercise these rights, contact us using the details below.

We may update this Privacy Policy from time to time. If we make changes, we will post the updated policy in the App or website and revise the "Last updated" date.

If you have any questions, concerns, or requests regarding this Privacy Policy, contact us at:

Email: inquiry@vgaadvisory.com