Privacy Policy

Effective Date: June 2025

1. Introduction

This Privacy Policy describes how data is collected, stored, and used by the HRV Focus Monitor — a personal, non-commercial research project developed by Wille Langberg.

2. Data Collected

The application collects the following categories of data:

3. Purpose of Data Collection

The data is used solely to test a predictive model for forecasting cognitive fatigue and productivity changes. All data analysis is conducted for academic and experimental purposes only.

4. Data Storage

All collected data is stored locally on a personal, encrypted device. No data is transferred, synchronized, or shared with any cloud service or third party.

5. Data Access

Only the developer (Wille Langberg) has access to the data. There are no external collaborators or data processors.

6. Legal Basis (GDPR)

The data is collected and processed on the basis of explicit, informed consent, in accordance with Article 6(1)(a) of the GDPR. The app is non-commercial and developed solely for academic interest.

7. Data Retention & Deletion

Users may request deletion of any personal data at any time by contacting the developer. No data is stored longer than necessary for the stated research purposes.

8. Contact Information

For any privacy-related inquiries, contact:

This policy may be updated in the future. Please refer back for the latest version.