Privacy Policy

1. Introduction

At Adjust Sleep, we take your privacy seriously. Our jet lag calculator is designed with a privacy-first approach. All calculations are performed locally in your browser.

2. Data Collection

We do not collect, store, or transmit any personal data, travel itineraries, or health information. When you input your departure city, destination, and sleep habits, this data remains entirely on your device.

3. Local Storage

We may use browser local storage solely to save your UI preferences, such as your light/dark mode selection. This data is never sent to our servers.

4. Third-Party Services

Our application uses zero external APIs for core calculations. The city timezone dataset is bundled directly into the application.