Privacy Policy

Last updated: November 5, 2026

crelve ("we") sets out this Privacy Policy (the "Policy") on how information about users is handled in the mobile application "Shiwaku" (the "App").

1. Basic policy

The App has no account registration and does not ask you to enter your name, email address, or similar information.
Your reading progress, recitation records and settings are stored on your device.

Information	Purpose
Reading progress (passages read, the date each was read)	Showing today's passage and the recitation map
Recitation records (results of each check, the next review date)	Deciding which passages to review and when
Settings and usage (display language, notification time, onboarding completion, etc.)	Displaying screens and sending reminders

This information is deleted from your device when you delete the App.

The App uses the services below. What each service collects and how it is handled follows its own privacy policy.

Service	Main information collected	Purpose
Google Firebase Analytics (Google LLC)	App usage (screen views, feature usage counts, etc.), device type, OS version, app instance ID	Analyzing and improving usage
Firebase Crashlytics (Google LLC)	Activity logs at the time of a crash, device type, OS version	Investigating and fixing bugs
Google AdMob (Google LLC)	Advertising identifier (IDFA, only if you allow it), IP address, device information, records of ads shown and tapped	Delivering ads and measuring their effect
RevenueCat (RevenueCat, Inc.)	Purchase history, purchase status, an anonymous in-app user ID	Managing purchases and restoring Premium

Apple (the App Store) processes payments. We do not receive payment information such as credit card numbers.

The App may show ads. Premium removes them.
In regions that require consent, such as the European Economic Area, the United Kingdom, and some US states, we ask for your consent through Google's User Messaging Platform (UMP) before ads are delivered.
On iOS, we ask for permission through App Tracking Transparency (ATT) to use the advertising identifier. If you do not allow it, you can still use the App, and ads are shown without personalization.

Except for transmission to the external services in Section 3, we do not provide your information to third parties, unless required by law.

The App is not directed to children under 13, and we do not knowingly collect information from children under 13.

You can change the use of the advertising identifier in iOS under Settings > Privacy & Security > Tracking.
You can turn reminders off in the App's settings or in iOS Settings > Notifications.
Deleting the App deletes all information stored on your device.

We may change this Policy as needed. The revised Policy takes effect when it is posted on this page.