ullu labs Privacy Policy

Last updated: March 23, 2026

ullu labs ("we", "our", or "us") develops mobile applications that provide digital reading tools and access to public domain books, including apps such as Rivro. This Privacy Policy explains how information is collected, used, and shared when you use our applications.

By using our applications, you agree to the practices described in this Privacy Policy.

Information We Collect

Our applications do not require users to create an account and we do not directly collect personally identifiable information such as your name, email address, or phone number.

However, certain information may be collected automatically through our app and third-party services. This may include:

• Device information (device model, OS version)
• Device identifiers (such as advertising ID)
• App usage data and interactions
• Crash logs and diagnostics data
• Performance data
• Approximate location (such as country or region)
• Purchase history related to in-app purchases and subscriptions

This information is used to operate the app, improve stability and performance, provide customer support, and support advertising and analytics.

Advertising

Our applications may display advertisements provided by third-party advertising partners.

These partners may collect and use certain information such as: