Energy Cost Calculator

# Privacy Policy for Energy Cost Calculator

**Effective Date:** 2026-04-13

**Developer:** Muhammad Ilyas

**Contact:** muhammadilyas15@gmail.com

## 1. Introduction

Energy Cost Calculator ("we", "our", "the app") is a household energy cost tracking application that helps you monitor electricity consumption and costs for your appliances. This Privacy Policy explains how we collect, use, store, and protect your information when you use our mobile application.

By using Energy Cost Calculator, you agree to the collection and use of information as described in this policy.

## 2. Information We Collect

### 2.1 Information You Provide

- Appliance information: name, category, wattage, usage hours, days of use, and notes

- Electricity rate and currency preferences

- Contact form submissions: subject, message content

### 2.2 Information Collected Automatically

- Device information (model, OS version, manufacturer) for crash reporting

- App usage analytics (screens visited, feature usage)

- Advertising identifiers (for ad personalization in the free tier)

### 2.3 Financial Data Note

The app calculates estimated electricity costs based on appliance wattage and your entered electricity rate. These cost calculations are performed locally on your device and are never transmitted to any server.

## 3. How We Use Your Information

We use collected information to:

- Provide core app functionality (appliance tracking, cost calculations, energy comparisons)

- Calculate and display estimated energy costs

- Display relevant advertisements (free tier)

- Improve app performance and fix crashes via crash reports

- Process subscription purchases (Premium upgrade)

## 4. Data Storage and Security

### 4.1 Local Storage

- All appliance data, usage logs, and cost calculations are stored locally on your device using a Room database

- User preferences (electricity rate, currency, theme) are stored locally using SharedPreferences

- No user data is transmitted to or stored on external servers

### 4.2 Security Measures

- All network communication (ads, analytics, crash reports) uses HTTPS/TLS encryption

- Your appliance and cost data never leaves your device

## 5. Data Sharing

### 5.1 We Do NOT Sell Your Data

We do not sell, trade, or rent your personal information to third parties.

### 5.2 Third-Party Services

We use the following third-party services that may collect data:

|---------|---------|--------------|----------------|

### 5.3 Ad Personalization

- Free tier users see advertisements served by Google AdMob

- AdMob may use device identifiers and usage data for ad personalization

- You can opt out of personalized ads through your device settings

- Premium subscribers see no advertisements

## 6. Children's Privacy

Energy Cost Calculator is not directed at children under the age of 13. We do not knowingly collect personal information from children under 13. If we discover that a child under 13 has provided us with personal information, we will delete it promptly.

## 7. Your Rights and Choices

### 7.1 Access and Control

- You can view all your appliance data within the app at any time

- You can edit or delete any appliance you have entered

- All data is stored locally and fully under your control

### 7.2 Data Deletion

- You can delete individual appliances from the app

- Uninstalling the app removes all locally stored data completely

### 7.3 Ad Preferences

- Premium subscription removes all advertisements

- You can opt out of personalized ads via device settings (Settings > Google > Ads)

## 8. GDPR Compliance (European Users)

If you are located in the European Economic Area (EEA), you have additional rights:

- **Right to access** -- request a copy of your data

- **Right to rectification** -- correct inaccurate data

- **Right to erasure** -- request deletion of your data

- **Right to restrict processing** -- limit how we use your data

- **Right to data portability** -- receive your data in a portable format

- **Right to object** -- object to data processing for marketing

The app uses Google's User Messaging Platform (UMP) to obtain consent for data processing and personalized advertising in compliance with GDPR.

To exercise any of these rights, contact us at muhammadilyas15@gmail.com.

## 9. Data Retention

- Local data is retained until you delete it or uninstall the app

- Analytics data is retained per Google's standard retention policies (14 months)

- Crash reports are retained for 90 days

## 10. Changes to This Policy

We may update this Privacy Policy from time to time. We will notify you of significant changes by:

- Updating the "Effective Date" at the top of this policy

- Posting a notice within the app

Your continued use of the app after changes constitutes acceptance of the updated policy.

## 11. Contact Us

If you have questions or concerns about this Privacy Policy or our data practices, contact us at:

**Email:** muhammadilyas15@gmail.com

**Developer:** Muhammad Ilyas

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