القواعد الأربع is an Android application developed by SEM-DEV Inc. and falls under the category of Education & Reference. The app is free to download and use. The program's name translates to "The Four Rules Investigator," and it is based on the teachings of Sheikh Abdul Mohsen al-Qasim, may God protect him. The app provides users with a clear and comprehensive understanding of the four rules and how they can be applied in daily life.

The interface of the app is user-friendly and easy to navigate, making it accessible to all users. The app is available in Arabic, and it is an excellent tool for those who want to learn more about the four rules. The app is regularly updated, and users can expect new content and features to be added to the app. Overall, القواعد الأربع is an excellent educational app that provides users with a comprehensive understanding of the four rules.