Privacy Policy

Effective Date: April 9, 2025  |  Last Updated: March 14, 2026

OurHertz (우리들의주파수, hereinafter "Company") respects your privacy and complies with applicable laws including Korea's Personal Information Protection Act (PIPA). This Privacy Policy explains how we collect, use, and protect your personal information when you use the Metronova service.

1. Information We Collect

Data	Collection Method	Required
Email address	Direct input at signup / Google OAuth	Required
Password (hashed)	Direct input at signup	Required
Usage records (uploaded audio metadata, BPM results)	Automatically collected during use	Automatic
Points transaction history	Automatically recorded during use	Automatic
In-app purchase records (transaction ID, receipt data, amount)	Automatically collected upon Apple In-App Purchase	Automatic
Advertising identifier (IDFA)	Collected via AdMob during rewarded ad viewing (with ATT consent)	Automatic

Actual payment instrument details (card numbers, bank accounts) are handled exclusively by Apple and are never stored by the Company.

2. How We Use Your Information

• Account creation, authentication, and management
• Providing the Service (BPM analysis, metronome track generation)
• Managing points balance and transaction records
• Processing payments, refunds, and cancellations
• Statistical analysis for service improvement
• Compliance with legal obligations
• Providing rewarded ads and processing point rewards

3. Retention Periods

Data Category	Retention Period	Legal Basis
Account data (email, points balance)	Deleted immediately upon account deletion	User consent
Payment and refund records	5 years from payment date	Korea E-Commerce Act Art. 6
Service usage logs	1 year	Korea Telecommunications Secrecy Act

4. Sharing Your Information

We do not sell or share your personal information with third parties, except in the following circumstances:

• You have given explicit prior consent
• Required by law or a court order

For in-app purchase processing, purchase information is transmitted to Apple. For rewarded ads, your advertising identifier is shared with Google AdMob (with ATT consent).

5. Service Providers (Processors)

Provider	Purpose
Google Firebase (Google LLC)	Authentication and database hosting
Cloudflare Inc.	Web hosting and CDN
Apple Inc.	In-app purchase processing
Google AdMob (Google LLC)	Rewarded ad delivery

6. Your Rights

You may exercise the following rights at any time:

• Access your personal data
• Request correction of inaccurate data
• Request deletion of your account and data
• Request restriction of processing

To exercise these rights, use the Settings page within the Service or contact us by email. We will respond within 10 business days.

7. Data Deletion

When retention periods expire or the purpose of collection is fulfilled, we permanently delete data using methods that prevent recovery. Electronic files are securely overwritten; physical documents are shredded or incinerated.

8. Cookies and Local Storage

We use browser localStorage and sessionStorage to maintain your login session.

The Google AdMob SDK may collect advertising identifiers and device information for rewarded ad delivery. We do not use any additional advertising or third-party tracking cookies.

9. Privacy Officer

Field	Details
Name	Go Geon-nyeong (고건녕)
Role	CEO / Privacy Officer
Email	[email protected]
Phone	050-6891-3237

You may also file complaints with Korean data protection authorities:

• Personal Information Infringement Report Center: 118 / privacy.kisa.or.kr

10. Changes to This Policy

We may update this Privacy Policy to reflect changes in law or our practices. Material changes will be announced in-service at least 7 days before taking effect.

OurHertz (우리들의주파수) · Business Reg. No. 864-52-00776 · 165 Sucheong-ro, Osan-si, Gyeonggi-do, Korea