Privacy Policy
Last Updated: October 24, 2025
Quick Overview - What You Need to Know
- ✓No account required - Use the App completely anonymously
- ✓Browser-first - Most processing happens on your device
- ✓Minimal server contact - Only for PDF reports, Oxynet analysis, and exams
- ✓No tracking - We don't use analytics or tracking cookies
- ✓Not for AI training - Your data is never used to train our algorithms
- ✓Auto-deletion - Server data is deleted immediately or after 30 days (exams)
- ✓GDPR compliant - Full rights to access, delete, and control your data
Introduction
Welcome to the Exercise Thresholds App ("we," "us," "our," or the "App"). We are committed to protecting your privacy and being transparent about how we handle data. This Privacy Policy explains our data practices for the Exercise Thresholds App available at https://www.exercisethresholds.com.
Our Privacy-First Approach: The Exercise Thresholds App is designed with privacy as a core principle. We do not require user accounts, do not track your activities, and process most data directly in your browser without sending it to our servers.
If you have questions about this policy, please contact us at support@exercisethresholds.com.
1. Information We Collect and Process
1.1 Exercise Physiology Data You Upload
When you use the App, you may upload exercise and spirometry datasets (CSV, Excel, or other supported formats) containing physiological measurements such as:
- Gas exchange data (VO₂, VCO₂)
- Ventilatory parameters
- Heart rate
- Power output or speed
- Lactate measurements
- Other exercise-related metrics
Important: We do not require or request any personally identifiable information (name, email, date of birth, etc.) in these datasets. All data processing is anonymous and happens entirely in your browser.
1.2 Data Created in the Exam Feature
When instructors create practice exams using our Exam feature, the following anonymous data is temporarily stored on our servers:
- Exercise datasets for the exam cases
- Exam questions and configurations
- Student responses and scores (anonymous, no identifying information)
This data is automatically deleted 30 days after the exam end date.
1.3 Technical Information
We do not use analytics, tracking cookies, or any third-party tracking tools.
2. How We Process Your Information
2.1 Browser-Based Processing (Client-Side)
The vast majority of data processing happens entirely in your web browser:
- File uploads and analysis
- Data visualization
- Most interactive features
This means your data never leaves your device for most App functions.
2.2 Server-Side Processing (Limited Cases)
Your data is sent to our servers only in these specific situations:
a) PDF Report Generation
When you request a PDF report of your analysis, anonymous spirometry data is transmitted to our server to generate the document. The data is processed and immediately discarded after the PDF is created.
b) Oxynet AI Analysis
When you use the Oxynet feature for AI-assisted threshold detection, anonymous spirometry data is sent to our server for analysis. The data is:
- Processed by our deep learning algorithms
- NOT used to train or improve AI models
- Immediately discarded after analysis is complete
- Never stored or retained
c) Exam Feature
When creating or participating in exams, anonymous data is stored temporarily (see Section 1.2) and automatically deleted after 30 days.
2.3 Purpose of Processing
We process data solely for the following purposes:
- To provide educational tools for learning exercise physiology concepts
- To enable threshold detection and analysis features
- To generate reports of your analyses
- To facilitate practice exams for educational purposes
- To maintain and improve the App's functionality
- To ensure security and prevent abuse
3. Data Retention and Deletion
| Data Type | Retention Period | Deletion Method |
|---|---|---|
| Browser-processed data | Not retained | Stays on your device only |
| PDF generation data | Immediate | Deleted after PDF creation |
| Oxynet analysis data | Immediate | Deleted after analysis |
| Exam feature data | 30 days after exam ends | Automatic deletion |
4. Data Sharing and Disclosure
We do not sell, rent, or share any data with third parties for any purpose.
We may disclose information only in these limited circumstances:
- Legal Requirements: If required by law, court order, or governmental authority
- Security: To protect against fraud, abuse, or security threats
5. Your Rights Under GDPR and Other Privacy Laws
Depending on your location, you may have the following rights:
5.1 European Union (GDPR)
If you are in the EU/EEA, you have the right to:
- Access: Request confirmation of what data we process
- Rectification: Correct inaccurate data
- Erasure: Request deletion of your data
- Restriction: Limit how we process your data
- Data Portability: Receive your data in a structured format
- Object: Object to processing based on legitimate interests
- Withdraw Consent: Withdraw consent at any time (where processing is based on consent)
5.2 United States (State Privacy Laws)
If you are a resident of California, Virginia, Colorado, Connecticut, Utah, or other states with privacy laws, you may have rights including:
- Right to know what personal information is collected
- Right to delete personal information
- Right to correct inaccuracies
- Right to opt-out of data sales (note: we do not sell data)
- Right to non-discrimination for exercising your rights
5.3 Other Jurisdictions
United Kingdom: Similar rights to GDPR apply under UK GDPR.
Canada: Rights under PIPEDA to access and correct personal information.
Australia/New Zealand: Rights under the Privacy Act 1988 (Australia) and Privacy Act 2020 (New Zealand) to access and correct personal information.
5.4 How to Exercise Your Rights
To exercise any of these rights, contact us at support@exercisethresholds.com.
Please note: Because most of our App operates without collecting personal information, many of these requests may not apply. For example, if you only use browser-based features, we have no data about you to access, delete, or correct.
6. Legal Basis for Processing (GDPR)
Under GDPR, we process data based on:
- Legitimate Interests: Operating an educational research tool (Article 6(1)(f))
- Consent: Where you explicitly choose to use server-based features like Oxynet or PDF generation (Article 6(1)(a))
- Legal Obligation: Compliance with applicable laws (Article 6(1)(c))
7. International Data Transfers
Our servers are located in the European Union. If data is transferred internationally, we ensure appropriate safeguards are in place, such as:
- Standard Contractual Clauses (SCCs) approved by the European Commission
- Adequacy decisions for transfers to countries with equivalent protection
- Your explicit consent for specific transfers
8. Data Security
We implement appropriate technical and organizational measures to protect data, including:
- Encryption of data in transit (HTTPS/TLS)
- Secure server infrastructure
- Regular security assessments
- Access controls and authentication
- Immediate deletion of temporary data after processing
9. Children's Privacy
The App is intended for educational and research purposes. We do not knowingly collect personal information from children under 16 (or the applicable age in your jurisdiction). If we become aware that we have collected personal information from a child without parental consent, we will take steps to delete that information.
10. Third-Party Services and Links
The App may contain links to external websites or resources. This Privacy Policy applies only to our App. We are not responsible for the privacy practices of third-party sites and encourage you to review their privacy policies.
11. Changes to This Privacy Policy
We may update this Privacy Policy to reflect changes in our practices or legal requirements. When we make changes:
- The "Last Updated" date at the top will be revised
- For material changes, we will provide prominent notice on the App
- Continued use of the App after changes constitutes acceptance of the updated policy
We encourage you to review this policy periodically.
12. Contact Information
If you have questions, concerns, or requests regarding this Privacy Policy or our data practices, please contact us:
Email: support@exercisethresholds.com
Responsible:
Felipe Mattioni Maturana - Software Development
Germany
Our Commitment
We built this App to advance exercise physiology education while respecting your privacy. We only process data necessary to provide the features you use, and we delete it as soon as possible.