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This Privacy Policy describes how Korus ("We", "Us", or "Our") collects, uses, and protects information when you use our application. By using Korus, you agree to the collection and use of information in accordance with this policy.

1. Interpretation and Definitions

Account — a unique account created for You to access our Service.
Application — refers to Korus, the software program provided by the Company.
Company — Korus ("We", "Us", or "Our").
Country — Philippines.
Device — any device that can access the Service.
Personal Data — any information that relates to an identified or identifiable individual.
Service — refers to the Korus Application.
You — the individual accessing or using the Service.

1A. Independent Application Notice

Korus is an independent application developed by a solo developer and is not affiliated with or endorsed by the Seventh-day Adventist Church or any of its affiliated organizations. Resources such as Adventist hymns included in the app are provided solely for reference, worship, and personal use.

2. What Data We Collect

2a. Account & Profile Data

Received from Google OAuth and stored in our cloud database:

  • User ID — a unique internal identifier assigned to your account
  • Email address
  • Full name
  • Profile picture URL
  • Authentication provider (Google)
  • Account created and last updated timestamps

2b. Email Communications Preference

When you create an account, your email updates preference is enabled by default. This allows the developer to occasionally send you app update announcements, new feature notices, or other relevant information to your registered email address.

You can turn this off at any time inside the app under More → Settings → Email Updates. Disabling it means you will no longer receive emails from the developer. This preference is synced to your account in the cloud.

2c. User-Generated Content

Content you create within the app is stored locally on your device and synced to our cloud:

  • Songs: title, artist name, lyrics content, created/updated timestamps, deletion flag
  • Collections: name, description, color, created/updated timestamps
  • Favorites: list of song IDs you have marked as favorite
  • Attachments per song: uploaded image files (file URLs, upload timestamps), PDF files (file URL, upload timestamp), links (URL, display name, timestamp)
  • User configuration: theme preference, navigation setting, hymnal edition, hymnal view mode, email updates opt-in flag

This may include lyrics, notes, attachments, and other materials that may be subject to third-party intellectual property rights. We do not review, verify, or claim ownership of user-generated content.

2d. Usage & Analytics Data (via Firebase Analytics)

Firebase Analytics automatically collects the following data when you use the app:

Data Description
City, Region, CountryApproximate location inferred from IP address
Device modele.g., Samsung Galaxy S23
Device categoryPhone or tablet
OS versionAndroid version installed
App versionKorus build version number
Screen resolutionDisplay dimensions of your device
LanguageDevice language / locale setting
Network typeWiFi or cellular data
Session durationTime spent in-app per session
First openTimestamp of your first app launch
RetentionDay 1 / Day 7 / Day 30 return rate (aggregate cohort)
Age rangeInferred via Google Signals — aggregate only, if Google Signals is enabled
GenderInferred via Google Signals — aggregate only, if Google Signals is enabled

In addition, we collect usage events such as app opens, screen views, content creation and edits, attachment uploads and removals, hymnal interactions, and feature usage. Event parameters contain only non-sensitive data such as counts, hymnal edition identifiers, and hymn numbers. No email addresses, names, passwords, lyrics content, or file contents are ever included in any analytics event.

On Android 13 and later, Firebase Analytics may access the Android Advertising ID (GAID) for analytics attribution purposes (e.g., distinguishing new vs. returning users). This identifier is not used for advertising or cross-app tracking — it is used solely to improve the accuracy of aggregate usage analytics within Korus.

2e. Crash & Error Reports (via Firebase Crashlytics)

  • Non-fatal error messages and stack traces
  • Error context tag — a short label identifying the area of the app where the error occurred
  • Device model, OS version, and app version at the time of the error
  • Linked to your internal account identifier — your name or email is never included

2f. What We Do NOT Collect

  • Advertising identifiers for advertising or cross-app tracking purposes — the Android Advertising ID (GAID) may be accessed by Firebase Analytics solely for analytics attribution within Korus, not for ads or profiling
  • GPS or precise location data
  • Payment or financial information
  • Passwords — authentication is handled entirely by Google OAuth
  • The content of your lyrics, images, or PDFs is never sent to analytics or crash reporting services

2g. Content Responsibility & Copyright

Korus allows users to store and access hymn lyrics, sheet music, and other related materials for personal, worship, and reference purposes.

Some content available through the app, including hymns and lyrics, may be protected by copyright and owned by their respective rights holders.

We do not claim ownership of third-party content. Users are responsible for ensuring that any content they upload, store, or share complies with applicable copyright laws.

If you are a copyright owner and believe that content within the app infringes your rights, please contact us at ronsell42@gmail.com and we will review and take appropriate action, including removal if necessary.

3. How We Use Your Data

  • Authenticate You and manage Your account.
  • Sync lyrics, collections, and preferences across devices.
  • Store and retrieve uploaded attachments (images, PDFs).
  • Display Your name and avatar within the app interface.
  • Manage user settings such as theme and hymnal preferences.
  • Analyze aggregate usage patterns (via Firebase Analytics) to understand how the app is used and improve it over time.
  • Diagnose and fix non-fatal errors (via Firebase Crashlytics) to improve app stability.
  • Send you occasional app update announcements or feature notices by email, if you have opted in to email communications (enabled by default, can be disabled in Settings).
  • We may also use limited account and content metadata to investigate abuse, enforce our policies, and respond to legal or copyright-related requests.

We do not use your data for advertising, profiling, or sale to third parties.

4. Data Storage: Local vs. Cloud

Local storage (on your device): Your content and account profile are cached locally on your device for offline access. Signing out clears all local user data from your device.

Cloud storage: Account data, lyrics, collections, favorites, change history, and attachments are stored securely in our cloud. File access uses secure, time-limited access links.

On-demand content downloads: Hymnal sheet music is not bundled with the initial app download. It is downloaded separately from our cloud storage when you choose to view it, and cached locally on your device for offline use.

International data transfers: Your data may be processed and stored on servers located outside your country, including by our third-party service providers (Supabase, Google/Firebase). By using the Service, you consent to this transfer.

5. Data Visibility & Access Policy

All data stored in our cloud — including your songs, collections, attachments, and account information — is stored securely with access controls that ensure only your account can access your own data through the app.

We do not actively monitor, read, or review your personal content. Your lyrics, images, and files are stored solely for the purpose of providing and syncing the Service to you.

However, stored data — including user-generated content, account metadata, and usage logs — may be accessed, reviewed, or disclosed if required by law, court order, or other legitimate legal process. We will comply with valid legal requests and, where permitted by law, will notify you of such requests.

This may include reviewing specific content only when necessary to investigate abuse, enforce policies, or respond to valid legal or copyright requests.

6. Third-Party Services

Korus uses the following third-party services:

  • Supabase — cloud database and file storage. See Supabase Privacy Policy.
  • Google OAuth — used for authentication. We receive email, name, and avatar URL. See Google Privacy Policy.
  • Firebase Analytics (Google LLC) — automatic and event-based usage analytics to help us understand and improve the app. See Google Privacy Policy.
  • Firebase Crashlytics (Google LLC) — crash and non-fatal error reporting for diagnosing app stability issues. See Google Privacy Policy.

7. Data Retention

  • In-app account deletion: When you delete your account via More → Settings → Delete Account, all your data — songs, collections, favorites, attachments, storage files, profile, and your Supabase authentication account — is permanently deleted immediately. This action is irreversible.
  • Residual data: Database backups or infrastructure logs managed by Supabase (our cloud provider) may retain traces of your data for a limited time per their own retention policies, independent of our deletion process.
  • Soft-deleted songs and collections (moved to Trash): retained for 7 days, then permanently removed.
  • Sync logs: cleaned up within 7 days once synced.
  • Analytics and crash data: retained per Firebase / Google's standard data retention policies.

8. Your Rights

  • Delete individual songs, collections, and attachments within the app at any time.
  • Sign out of the app to immediately clear all local user data from your device.
  • Delete your account directly within the app — via More → Settings → Delete Account. This permanently and irreversibly removes:
    • All your songs, collections, favorites, and attachments from the cloud database
    • All uploaded image and PDF files from cloud storage
    • Your account profile and configuration
    • All local data from your device
    This includes your Supabase authentication account (your login credential), all cloud database records, all uploaded files in cloud storage, and all local data on your device. You will be asked to confirm your full name and acknowledge the action before deletion proceeds. This cannot be undone.
  • Disable email updates at any time via More → Settings → Email Updates.
  • Contact us at ronsell42@gmail.com for any additional data requests or questions about your data.

9. Security

  • All data transmitted over HTTPS.
  • Access controls ensure users can only access their own data.
  • Attachments are served via secure, time-limited access links.
  • No plain-text passwords — authentication via Google OAuth only.

We cannot guarantee absolute security of data transmission or storage.

10. Children's Privacy

Our Service requires users to sign in with a Google account and is intended for users aged 13 and older. We do not knowingly collect personal data from anyone under 13. If you are a parent or guardian and believe your child has provided us with personal data, please contact us and we will promptly delete that information.

While the app's content rating allows broad age access (3+), full use of the Service requires Google account authentication, which Google limits to users 13 and older per their Terms of Service.

12. Changes to This Privacy Policy

We may update this Privacy Policy from time to time. Updates are effective when posted on this page. Continued use of the Service after changes constitutes acceptance of the revised policy.

13. Contact Us

If you have questions about this Privacy Policy, please contact us:

By email: ronsell42@gmail.com

For copyright concerns or content removal requests, contact: ronsell42@gmail.com