SDA Sabbath School Quarterly is an Android app developed by Stefan Rusek under the Education & Reference category. It is a free app that provides users with access to all the Sabbath School quarterlies for the current and previous three quarters. The app is designed to allow Seventh-Day Adventist Biblical studies to be easily accessible on mobile devices.

The app comes with a note-taking feature that allows users to take notes during their study, which can be accessed later during Sabbath school discussions. The app also makes it easy to navigate from one day of study to another with a tap or swipe of the finger.

It's worth noting that the app is an independent ministry that supports the mission of the Seventh-day Adventist Church, but it is not affiliated with the General Conference of Seventh-day Adventists® headquartered in Silver Spring, Maryland or any of its affiliates known as the Seventh-day Adventist ® Church.

Overall, the SDA Sabbath School Quarterly app is an excellent resource for Seventh-Day Adventist members who want to study the Bible on their mobile devices.