# Privacy Policy

This privacy policy applies to the Lucky Number app (hereby referred to as "Application") for mobile devices that was created by an individual developer (hereby referred to as "Service Provider") as a Free service. This service is intended for use "AS IS".


## Information Collection and Use

For a better experience, while using the Application, the Service Provider may use third-party services that may collect certain information automatically. The Application does not require users to provide personally identifiable information such as email address, avatar, or profile information.
Information created or entered by users within the Application is primarily retained on the user's device and is not directly collected or stored by the Service Provider on its own servers.

The Application uses the following third-party services:
* **Firebase Analytics** — used to understand how the Application is used and to improve its functionality and user experience.
* **Firebase Crashlytics** — used to collect crash reports and diagnostic information to help identify and fix technical problems.
* **Google AdMob** — used to display advertisements in the Application.
* **RevenueCat** — used to manage in-app purchases and determine access to purchased features.

These third-party services may collect information such as device information, operating system information, application usage information, diagnostic information, advertising identifiers, and purchase-related information, depending on the service and the user's device settings.
Links to the privacy policies of the third-party service providers used by the Application:

* [Firebase Privacy Policy](https://firebase.google.com/support/privacy)
* [Google Privacy Policy](https://policies.google.com/privacy)
* [RevenueCat Privacy Policy](https://www.revenuecat.com/privacy)
* [Apple Privacy Policy](https://www.apple.com/legal/privacy/)


## Log Data

The Service Provider wants to inform you that whenever you use the Application, in case of an error or crash, data and information through third-party products may be collected for diagnostic purposes.
Firebase Crashlytics may collect Log Data such as device information, device model, operating system version, Application version, crash information, and other diagnostic information.
Firebase Analytics may also collect information about how the Application is used, such as application events, interactions, and other usage statistics.
This information is used to help the Service Provider understand Application usage, improve the Application, and identify and fix technical problems.


## Advertising

The Application uses Google AdMob to display advertisements.
AdMob may collect information such as device information, advertising identifiers, application usage information, and other information necessary to provide, measure, and improve advertising services.
The information collected by AdMob may depend on the user's device settings, applicable privacy requirements, and advertising configuration.
For more information, please review the [Google Privacy Policy](https://policies.google.com/privacy).


## In-App Purchases

The Application may offer optional one-time in-app purchases.
Purchases are processed through Apple's App Store payment system. The Service Provider does not receive or store users' credit card numbers, payment card information, or other payment credentials.
RevenueCat is used to manage purchase information and determine whether a purchase has been completed and whether the user has access to purchased features.
For more information, please review the [RevenueCat Privacy Policy](https://www.revenuecat.com/privacy).


## Cookies

This Application does not use cookies explicitly.
However, third-party services or libraries used by the Application may use technologies that are similar to cookies for analytics, advertising, security, or other service-related purposes.


## Service Providers

The Service Provider may employ third-party companies and individuals due to the following reasons:
* To facilitate the Service;
* To provide the Service on behalf of the Service Provider;
* To perform Service-related services;
* To display advertisements;
* To process and manage in-app purchases; or
* To assist in analyzing how the Application is used and diagnosing technical problems.

The Service Provider wants to inform users of this Application that these third-party services may collect and process certain information as necessary to perform the tasks assigned to them or to provide their respective services.
These third parties handle information according to their own privacy policies and applicable terms and conditions.


## Security

The Service Provider values your trust in using the Application and strives to use commercially acceptable means of protecting information. However, remember that no method of transmission over the internet or method of electronic storage is 100% secure and reliable, and the Service Provider cannot guarantee its absolute security.


## Links to Other Sites

This Application may contain links to other sites. If you click on a third-party link, you will be directed to that site. Note that these external sites are not operated by the Service Provider.
Therefore, the Service Provider strongly advises you to review the Privacy Policy of these websites. The Service Provider has no control over and assumes no responsibility for the content, privacy policies, or practices of any third-party sites or services.


## Children's Privacy

The Application does not knowingly collect personally identifiable information directly from children under the age of 13.
The Service Provider does not knowingly request personal information from children under 13 years of age. Third-party services used by the Application may have their own policies and requirements regarding children's privacy.
If the Service Provider becomes aware that a child under 13 has directly provided personal information to the Service Provider, the Service Provider will take reasonable steps to address the situation.
If you are a parent or guardian and you believe that your child has provided personal information, please contact the Service Provider so that appropriate actions can be taken.


## Changes to This Privacy Policy

The Service Provider may update this Privacy Policy from time to time. Thus, you are advised to review this page periodically for any changes.
The Service Provider will notify users of any changes by posting the new Privacy Policy on this page.
This policy is effective as of 2026-08-13


## Contact Us

If you have any questions or suggestions about this Privacy Policy, please contact:
Email: nguyenphu27@gmail.com