Privacy Policy

1. Introduction

WattMate is an electric vehicle charging tracker application. This Privacy Policy explains how the app collects, uses, and protects your personal information during use.

2. Information We Collect

2.1 Account Information

• Email address for account creation, authentication, and verification
• Display name (optional) for personalization
• Subscription status (Free or Premium tier information)

2.2 Vehicle Information

• Vehicle make, model, variant, and year
• Battery capacity (kWh)
• Power output (kW or hp)
• Drivetrain type
• Currency setting per vehicle

2.3 Charging Session Data

• Date and time of sessions
• Odometer readings (km)
• State of charge (start/end percentages)
• Energy consumed (kWh)
• Charging duration
• Charging costs
• Charging type (AC/DC)
• Trip consumption from board computer (optional)
• Missed sessions indicator for data continuity

2.4 App Preferences

• Distance units (km/miles)
• Consumption units (kWh/100km, Wh/km, mi/kWh, kWh/100mi)
• Power units (kW/hp)
• Date format preference
• Theme preference (Light/Dark/System)

3. How We Use Your Information

The app uses information to:

• Provide and maintain the WattMate service
• Calculate charging statistics and efficiency metrics
• Sync data across devices
• Send account verification emails
• Process subscription purchases
• Improve the app experience

4. Data Storage and Security

Your data is stored securely using Google Firebase services:

• Firebase Authentication: Manages accounts securely
• Cloud Firestore: Stores vehicle and charging data
• Firebase Remote Config: Delivers the EV catalog database

All data is encrypted in transit and at rest. Industry-standard security practices protect your information.

5. AI Photo Fill

AI Photo Fill helps you enter a charging session by extracting values from images you select, such as charging receipts or dashboard photos. The selected images are sent to one external AI processor for this purpose. WattMate does not create or keep a persistent copy of the submitted images in your account or database.

AI-generated values may be incomplete or inaccurate. You must review every extracted value before saving the charging session.

Current AI Processors

• Google Gemini: WattMate uses the paid Gemini API. Google does not use paid-service prompts, submitted files such as images, or responses to improve its products. Google may retain prompts, related context, and outputs for up to 55 days for abuse monitoring, policy enforcement, and required legal or regulatory disclosures. This monitoring data is not used to train or fine-tune general-purpose AI models. See Google's Gemini API abuse-monitoring policy and Gemini API terms.
• OpenAI: WattMate uses the standard global Responses API with store: false, so OpenAI does not retain application state for the response. Standard abuse-monitoring logs may still contain submitted images, prompts, responses, or related metadata and may be retained for up to 30 days, or longer when required by law. This global setup does not guarantee that processing occurs only in the European Union. OpenAI does not use API inputs or outputs to train its models unless the API account owner explicitly opts in. See OpenAI's API data controls.

The current processor list is published here and may change as WattMate's providers change. A material change to how images are processed or retained, or to your control over Photo Fill, will require a new version of the in-app disclosure before the changed processing is used.

6. Third-Party Services

WattMate uses these third-party services:

• Google Firebase (authentication, database, cloud functions, app configuration)
• Google Gemini and OpenAI (AI Photo Fill processing described in Section 5)
• Google Sign-In (optional authentication method)
• In-app purchase and billing providers used for subscription purchases on supported platforms
• Brevo / Sendinblue (account verification emails)
• Frankfurter API (currency exchange rates; no personal data sent)

7. Data Sharing

We do not sell your personal information to third parties.

Information may be shared:

• With your consent
• With service providers assisting in app operations (Sections 5 and 6)
• To comply with legal obligations
• To protect app rights or user safety

8. Your Rights

You have the right to:

• Access: View all your data within the app
• Export: Export charging sessions in CSV format
• Delete: Remove your account and all associated data
• Correct: Update your information at any time

How to Delete Your Account

To delete your account and associated data:

1. Go to Settings
2. Scroll to the Profile section
3. Tap “Delete Account”
4. Confirm by checking the acknowledgment checkbox
5. Verify your identity (enter your password or sign in with Google)

This action is permanent and cannot be undone. All vehicles, charging sessions, and account data will be permanently deleted immediately.

9. Data Retention

• Data is retained while your account remains active
• Upon account deletion, all data is permanently removed from servers immediately
• Unverified accounts (not completed email verification) are automatically deleted after 7 days

10. Children's Privacy

WattMate is not intended for children under 13. The app does not knowingly collect personal information from children under 13.

11. Changes to This Policy

The Privacy Policy may be updated periodically. Significant changes will be communicated through in-app notifications or email.

12. Contact Us

For questions about this Privacy Policy or your data:

Email: support@watt-mate.app