Privacy Policy

Last updated: January 19, 2026

Overview

TrackMyTank is a fuel tracking app designed with privacy in mind. Your data is stored locally on your device by default, and cloud sync is completely optional.

The app works fully offline without an account. You only need to sign in if you want to backup your data to the cloud or access it across multiple devices.

Data We Collect

1. Fuel & Vehicle Data

When you use the app, you may enter:

  • Vehicle information (name, type, fuel type)
  • Fuel entries (date, odometer reading, fuel amount, price, total cost)
  • Optional notes for each entry

This data is stored locally on your device. If you enable cloud sync, this data is also stored securely in our database.

2. User Preferences

We store your app preferences locally, including:

  • Preferred currency
  • Distance unit (km/miles)
  • Volume unit (liters/gallons)
  • Theme preference

3. Account Information (Optional)

If you choose to create an account for cloud sync, we collect:

  • Email address
  • Name (from your Google account, if using Google Sign-In)

4. Anonymous Analytics

We collect anonymous usage data to improve the app, including:

  • Page views and feature usage
  • General geographic location (country level)
  • Device type and browser

This data is anonymized and cannot be used to identify you personally.

How We Use Your Data

  • Fuel tracking: To provide you with insights about your fuel consumption and spending
  • Cloud sync: To backup and sync your data across devices (if enabled)
  • Analytics: To understand how people use the app and make improvements

Third-Party Services

We use the following third-party services:

  • Supabase: Database and authentication (for cloud sync)
  • Vercel: Hosting and analytics
  • Google: Sign-in authentication (optional)

These services have their own privacy policies and may collect additional data as described in their respective policies.

Data Storage & Security

  • Local data: Stored in your browser's IndexedDB, encrypted by your browser
  • Cloud data: Stored securely in Supabase with row-level security policies
  • Passwords: We don't store passwords - authentication is handled by Google or Supabase Auth

Your Rights

You have the right to:

  • Access: View all data stored about you
  • Delete: Delete your data at any time (clear local storage or delete your account)
  • Export: Your data is yours - you can view it anytime in the app
  • Opt-out: Use the app without an account (fully local storage)

Data Retention

  • Local data: Stored until you clear your browser data or uninstall the app
  • Cloud data: Stored until you delete your account
  • Analytics: Retained for up to 12 months

Children's Privacy

TrackMyTank is not intended for children under 13. We do not knowingly collect personal information from children.

Changes to This Policy

We may update this privacy policy from time to time. We will notify you of any changes by posting the new policy on this page and updating the "Last updated" date.

Contact Us

If you have any questions about this privacy policy or your data, please contact us at:

[email protected]