Privacy Policy

Last Updated: February 26, 2026

TL;DR: 512Hz.net processes all data locally in your browser. We don't store, transmit, or access your patient data. We use Google Analytics (with your consent) to understand how people use our tool. That's it.

1. Introduction

512Hz.net ("we," "our," or "us") is committed to protecting your privacy. This Privacy Policy explains how we collect, use, disclose, and safeguard your information when you use our audiogram calculator tool (the "Service").

By using 512Hz.net, you agree to the collection and use of information in accordance with this Privacy Policy.

2. Information We DO NOT Collect

The most important thing to understand about 512Hz.net is what we don't collect:

Patient Data: We never store, transmit, or access any patient information you enter (names, ages, dates, audiogram measurements, diagnoses)
Medical Records: All audiogram data remains entirely on your device
Personal Health Information (PHI): We have no access to any protected health information
Account Information: We don't require registration or accounts
Uploaded Files: We don't support file uploads to servers

How We Achieve This: Our calculator runs entirely in your web browser using JavaScript. All calculations, plotting, and data processing happen on your device. Nothing is sent to our servers.

3. Information We DO Collect

3.1 Analytics Data (Optional - Requires Your Consent)

With your explicit consent (via our cookie banner), we use Google Analytics to collect:

Pages you visit on our site
How long you spend on the site
Which browser and device you use
Your approximate location (city/country level, via anonymized IP)
How you found our site (referral source)

Purpose: To understand how people use our tool and improve it.

Your Control: You can reject analytics cookies at any time using our cookie settings.

3.2 Technical Information (Automatic)

Our web server automatically collects minimal technical data required to deliver the website:

IP address (for routing web traffic)
Browser type and version
Date and time of access
Pages visited

Purpose: Security, debugging, and preventing abuse.

Retention: Server logs are deleted after 30 days.

4. How We Use Information

We use collected information only for:

Providing and maintaining the Service
Improving user experience and functionality
Understanding usage patterns to prioritize new features
Detecting and preventing technical problems
Complying with legal obligations

We never use information for:

Selling or sharing with third parties (except analytics providers with your consent)
Targeted advertising
Marketing communications (we don't have your email)
Profiling or automated decision-making

5. Data Storage and Security

5.1 Patient Data (Your Device)

All audiogram data you enter is stored exclusively on your device using:

Browser localStorage: For auto-save and theme preferences
Browser memory: For active session data

What this means:

Data persists when you close the browser (unless you clear browser data)
Data is never transmitted over the internet
We cannot access, recover, or back up your data
If you clear your browser data, your audiograms are permanently deleted

5.2 Analytics Data (Google's Servers)

If you consent to analytics, Google Analytics stores:

Anonymized usage data on Google's secure servers
Data retention period: 26 months
IP anonymization enabled (last octet removed)

Google Analytics privacy policy: https://policies.google.com/privacy

6. Your Rights (GDPR & Privacy Laws)

Under the EU General Data Protection Regulation (GDPR) and similar laws, you have these rights:

6.1 Right to Access

You can request a copy of any personal data we hold about you. Note: We hold almost no personal data (see section 3).

6.2 Right to Rectification

You can ask us to correct inaccurate personal data. Since we don't store patient data, this mainly applies to any communications with us.

6.3 Right to Erasure ("Right to be Forgotten")

You can request deletion of your personal data. For analytics data, we can request deletion from Google Analytics.

6.4 Right to Restrict Processing

You can ask us to stop processing your data while we investigate a complaint.

6.5 Right to Data Portability

You can request your data in a machine-readable format. For audiograms, use our "Export PNG" feature.

6.6 Right to Object

You can object to analytics tracking at any time via our cookie settings.

6.7 Right to Withdraw Consent

You can withdraw cookie consent at any time by:

Clicking "Cookie Settings" in the footer
Clearing your browser cookies
Using browser privacy modes

To exercise these rights: Contact us at 512hz@proton.me

7. Cookies

7.1 Essential Cookies (Always Active)

These cookies are necessary for the website to function:

cookie_consent: Remembers your cookie choice
theme: Stores your dark/light theme preference

7.2 Analytics Cookies (Optional - Requires Consent)

Google Analytics cookies (only if you accept):

_ga: Distinguishes users (2 years)
_gid: Distinguishes users (24 hours)
_gat: Throttles request rate (1 minute)

7.3 Managing Cookies

You can control cookies via:

Our cookie consent banner (appears on first visit)
Cookie Settings link in footer (change preferences anytime)
Your browser settings (block all cookies)

8. Third-Party Services

8.1 Google Analytics

Purpose: Usage analytics (with your consent)

Data shared: Anonymized usage patterns, no patient data

Privacy policy: https://policies.google.com/privacy

8.2 Google Fonts

Purpose: Website typography

Data shared: IP address (necessary for font delivery)

Privacy policy: https://policies.google.com/privacy

No other third parties have access to any data.

9. Children's Privacy

Our Service is intended for healthcare professionals and is not directed to children under 13. We do not knowingly collect personal information from children under 13.

If you are a parent or guardian and believe your child has provided us with personal information, please contact us at 512hz@proton.me.

10. International Data Transfers

Our website is hosted in the European Union. If you access our Service from outside the EU, your information may be transferred to, stored, and processed in EU data centers.

For EU visitors: All data processing complies with GDPR requirements. Google Analytics uses Standard Contractual Clauses (SCCs) approved by the EU Commission for any international data transfers.

11. Data Retention

Data Type	Retention Period	Location
Audiogram data	Until you clear browser data	Your device only
Analytics data	26 months	Google servers
Server logs	30 days	Our servers
Cookie preferences	Until you clear browser data	Your device only

13. Security Measures

We implement appropriate technical and organizational measures:

HTTPS/SSL: All traffic encrypted in transit
Client-side processing: No server-side patient data storage
Regular updates: Security patches applied promptly
Access controls: Limited access to server infrastructure
Monitoring: Automated alerts for suspicious activity

Note: No method of transmission over the internet is 100% secure. We cannot guarantee absolute security.

14. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Changes will be posted on this page with an updated "Last Updated" date.

For significant changes, we will:

Display a prominent notice on our website
Update the "Last Updated" date
Request renewed consent if required by law

Your continued use of the Service after changes constitutes acceptance of the updated Privacy Policy.

15. Contact Us

If you have questions about this Privacy Policy or wish to exercise your privacy rights:

Email: 512hz@proton.me
Website: https://512hz.net

We will respond to all requests within 30 days as required by GDPR.

16. Supervisory Authority

If you are in the EU/EEA and believe we have not handled your personal data appropriately, you have the right to lodge a complaint with your local data protection authority.

Find your authority: https://edpb.europa.eu/about-edpb/board/members_en