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Privacy Policy

Last updated: September 28, 2026

This Privacy Policy describes how the operator of VoltEzy (“we,” “us,” or “our”) collects, uses, and shares information when you use the VoltEzy mobile application and related services (the “Service”). By using the Service, you agree to this Policy. If you do not agree, please do not use the Service.

1. Information we collect

1.1 Account information

You can use VoltEzy without an account. If you create one or sign in, we use Firebase Authentication (provided by Google) to manage it, and it stores:

  • a unique user ID;
  • your email address, and the display name you choose, if you sign up with email. Firebase handles your password, and we never see it;
  • if you use Sign in with Google or Sign in with Apple, the details that provider shares with us: usually your name, email address and, for Google, your profile photo. Apple can give us a private relay email address instead of your real one.

1.2 Learning progress

When you are signed in, the app saves your progress for each lesson to Cloud Firestore (provided by Google) so it can follow you to other devices. This includes:

  • the lesson and course ID;
  • whether you finished the lesson, your score, and the number of attempts;
  • the XP you earned;
  • when you completed or last updated the lesson.

Everything else stays on your device and is not sent to us. That includes the circuits you build, your answers, streaks, hearts, coins, reminders and settings.

1.3 Crash reports

If the app crashes, Firebase Crashlytics (provided by Google) sends us a crash report. It contains:

  • the stack trace;
  • your device model and operating system version;
  • the app version;
  • device state at the time of the crash, such as free memory and orientation;
  • a random identifier for this app installation.

We do not attach your name, email address or user ID to crash reports.

1.4 Usage analytics (iOS only)

The iOS app includes Google Analytics for Firebase. It records basic app events, such as app opens, sessions and screens viewed, together with:

  • a random app-instance identifier;
  • your device model, operating system and app version;
  • an approximate location (country or region), derived from your IP address.

We do not use it for advertising. The Android app does not include analytics.

1.5 Subscriptions

If you buy a subscription, Apple or Google processes the payment; we never receive your card details. We use RevenueCat to check whether your subscription is active. RevenueCat receives:

  • the purchase receipt and transaction details (product, price, dates, status);
  • your VoltEzy user ID, or an anonymous ID if you are not signed in;
  • basic device and app information.

2. How we use information

We use the information above to:

  • Provide the interactive lessons, the built-in circuit simulator and progress tracking, and keep your progress in sync across devices;
  • Sign you in and apply your subscription;
  • Find and fix crashes and bugs, and understand how the app is used so we can improve it;
  • Monitor abuse, fraud, and security incidents;
  • Respond to your support requests;
  • Comply with legal obligations and enforce our Terms & Conditions.

We do not show ads, and we do not use your information for advertising.

3. Automated processing

Lesson checks, hints, and simulator feedback come from our authored lesson content and rules built into the app. We do not send your content to AI or machine-learning services.

4. Who we share information with

We share information only with the service providers that run parts of the Service for us, and only for the purposes above:

  • Google Firebase (Google LLC) provides Authentication, Cloud Firestore, Crashlytics and, on iOS, Google Analytics for Firebase. See Privacy and Security in Firebase.
  • Google and Apple handle sign-in if you choose Sign in with Google or Sign in with Apple. They also handle distribution, updates and payments through Google Play and the App Store.
  • RevenueCat, Inc. manages subscriptions. See the RevenueCat Privacy Policy.

We may also disclose information when the law requires it, to protect rights and safety, or in connection with a merger or asset sale (with notice where appropriate).

We do not sell your personal information as “sale” is commonly understood in U.S. state privacy laws.

5. Retention

  • Account and synced progress are kept until you delete your account or ask us to delete them.
  • Crash reports are kept by Crashlytics for 90 days.
  • Analytics data (iOS) is kept for up to 14 months.
  • Subscription records are kept for as long as we need them to manage your subscription and meet tax and accounting obligations.
  • Data on your device stays there until you reset your progress or uninstall the app.

6. Security

Data is encrypted in transit between the app and our providers. Synced progress is stored so that only your own account can read or change it. No method of transmission or storage is completely secure, so we cannot guarantee absolute security.

7. Deleting your data and your rights

  • Reset your progress: in the app, open Profile and tap “Reset all progress.” This clears progress on your device and, if you are signed in, your synced progress.
  • Delete your account: email us at voltezy.app@gmail.com from the email address on your account, with the subject “Delete my VoltEzy account.” We will delete your account and all synced progress within 30 days and confirm by email. Crash reports are not linked to your account and expire on their own after 90 days.
  • Remove on-device data: uninstall the app.

Depending on where you live, you may also have rights to access, correct, export or delete your personal information, or to object to or restrict certain processing. To exercise them, contact us as described below. You can manage notification permissions in your device settings.

8. Children

The Service is not directed at children under 13 (or the age required in your jurisdiction). We do not knowingly collect personal information from children. If you believe we have, contact us and we will take appropriate steps.

9. International transfers

Account data and synced progress are stored by Google in the United States. Our providers may process data in other countries too. Where required, we use appropriate safeguards for cross-border transfers.

10. Changes to this Policy

We may update this Privacy Policy from time to time. We will post the revised version here and update the “Last updated” date. For material changes, we will provide additional notice where required by law.

11. Contact

For privacy questions or requests, email us at voltezy.app@gmail.com.