Privacy Policy

Last Updated: July 2, 2025

We respect the privacy of users of the music diary application "Muse" (the "App") and are committed to protecting personal information. This Privacy Policy explains our practices regarding the collection, use, and disclosure of personal information.

1. Collection of Personal Information

We collect personal information in the App in the following cases:

When downloading and installing the App
When registering an account (including email, Spotify, or Apple ID login)
When linking with third-party services (Spotify, Apple)
When making in-app purchases
When setting up push notifications
When contacting support

2. Types of Personal Information Collected

The App collects the following personal information:

Device identifiers (IDFA, Android ID, etc.)
Device information (OS, model, language settings, etc.)
App usage history
Location information (only when permitted)
Camera and microphone access (only when permitted)
Contact information (only when permitted)
Push notification tokens
In-app purchase history
Third-party authentication services:
- Spotify: Username, profile information, music playback history
- Apple ID: Username, email address, profile information

3. Device Permissions

The App may request the following permissions:

Location: For location-based services (registering diary location)
Camera & Microphone: For media upload and photo capture functions
Storage: For local caching and data saving
Notifications: For sending push notifications and recording reminders

These permissions can be toggled on or off at any time from your device's settings screen.

4. Purpose of Use of Personal Information

We use the collected personal information for the following purposes:

Providing and improving the App features
User authentication and account management
Personalization features through integration with third-party services (Spotify, Apple)
Customizing music experiences and recommendations
Providing customized content
Sending push notifications
Usage statistics and analysis
Detecting and preventing unauthorized use
Ad delivery and optimization
Processing in-app purchases

5. Integration with Third-Party Services

The App utilizes the following third-party services, and their respective privacy policies apply:

Spotify (Music Streaming & Login)
Apple ID (Apple Login)
Google Analytics (Usage Analytics)
Firebase (Push Notifications & Auth)
Apple App Store / Google Play Store (In-app Purchases)
Google AdMob (Ad Delivery Services)

5-1. Third-Party Authentication Services

Spotify Integration:

Log in functionality using a Spotify account
Retrieving music playback history (for personalization)
Synchronizing playlist information
Analyzing favorite tracks

Apple ID Integration:

Log in functionality using Apple ID
Retrieving basic profile information
Support for email address anonymization options
Apple Music integration (where applicable)

6. Data Storage and Deletion

Personal information is stored only for the period necessary to achieve the purpose of use and is promptly deleted when no longer needed.

Even if you delete (uninstall) the App, some data may remain on our servers. If you wish for complete deletion, please request it through the following methods:

Apply via "Settings" → "Delete Account" in the App
Send a deletion request to support email (info@musesns.com)

7. Data Retention Period

Account Info: Until account deletion
App Usage History: 2 years from last usage
Push Notification Token: Until App uninstallation
Purchase History: Statutory retention period (7 years)
Analytics Data: Stored for statistical purposes after anonymization
Spotify Linked Data / Apple ID Linked Data: Promptly deleted upon disconnecting integration

8. Advertising and Data Collection

The App utilizes "Google AdMob" provided by Google LLC for displaying and optimizing advertisements. Google AdMob may automatically collect and transmit information such as device identifiers (IDFA on iOS, Google Advertising ID on Android, etc.), IP addresses, and in-app action history to display personalized ads and measure effectiveness.

If you do not want personalized ads or wish to prevent tracking, you can configure your opt-out settings:

iOS: Go to Settings ＞ Privacy & Security ＞ Tracking on your device, and toggle tracking off for specific apps.
Android: Go to Settings ＞ Google ＞ Ads on your device, and select "Opt out of Ads Personalization" or "Delete advertising ID".
In-App: You can also toggle tracking via Settings ＞ Privacy ＞ Ad Settings inside the App.

9. Children's Privacy

The App is not directed to children under the age of 13. We do not knowingly collect personal information from children under 13. If we discover that we have collected personal information from a child under 13, we will promptly delete it.

10. User Rights

Users have the rights of access, rectification, erasure (to be forgotten), restriction of processing, and consent withdrawal regarding their personal information. To exercise these rights, please contact us via the in-app contact form or the email address below.

11. Privacy Settings

Users can control permissions, notifications, ad personalization, and external service integrations (Spotify/Apple Music) from the App settings screen.

12. Legal Compliance

We handle personal information in compliance with the Act on the Protection of Personal Information (APPI) in Japan, GDPR in Europe, CCPA in the US, and COPPA for children.

13. International Data Transfers

Personal information may be processed and stored globally (Japan, US, EU) with appropriate safeguards such as Standard Contractual Clauses (SCC).

14. Contact Us

Email: info@musesns.com
In-App: Settings ＞ Support ＞ Contact Us

15. Changes to Privacy Policy

Important changes will be notified in advance via in-app alerts or email. Minor changes are reflected immediately by updating the policy date.