Privacy Policy

Last updated: 15 December 2025

1. Introduction

This Privacy Policy explains how Device Smart Ltd. collects, uses, and protects information when you use the emmjen mobile application (the “App”).

2. Information We Collect

The App is designed to function primarily as an offline Bluetooth configuration tool. We collect minimal information.

2.1 Information You Provide

We do not require account creation and do not request personal information such as name, address, or payment details.

2.2 Automatically Collected Information

The App may collect the following technical information:

• Bluetooth status and device identifiers necessary to establish a connection
• Basic device information (operating system version, device model)
• App diagnostic and crash data

This information is used solely to ensure proper operation and improve reliability.

2.3 Fuel Cell Configuration Data

Configuration parameters (e.g., voltage thresholds, tank height values) are stored locally on your device and/or transmitted directly to the fuel cell via Bluetooth. We do not collect or store this data on external servers.

3. How We Use Information

We use collected information to:

• Enable Bluetooth connectivity
• Improve App stability and performance
• Diagnose and fix errors

We do not use your information for advertising or profiling.

4. Data Sharing

We do not sell, rent, or share personal data with third parties. Information may be disclosed only if required by law or to comply with legal obligations.

5. Data Storage and Security

• The App does not use cloud storage or external servers for user data
• Data remains on your device unless transmitted directly to the fuel cell hardware
• We implement reasonable technical measures to protect information from unauthorised access

6. User Permissions

The App may request the following permissions:

• Bluetooth: Required to connect to the fuel cell adapter
• Location (if required by OS): Used only to enable Bluetooth scanning, not for tracking

We do not use location data for any other purpose.

7. Data Retention

We retain technical and diagnostic data only for as long as necessary to support App functionality or comply with legal obligations.

8. Children’s Privacy

The App is not intended for use by children under the age of 13. We do not knowingly collect personal data from children.

9. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Changes will be effective when posted within the App or on the App Store listing.

10. Contact Us

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