Geschool Secure Mode Only is an Android application developed by Yayasan Generasi Cerdas Mandiri. It is a free education and reference app that is specifically designed for certain Android phones with version 7 and above that support locked mode. The app is primarily used for official school exams that require prevention against cheating.

In this mode, students can only access the exam through a specific application that can be set up for the locked screen. However, due to the limitations of the Android operating system, especially versions 7 and below, not all Android devices are supported. Only Android devices with Android ONE OS are guaranteed to be supported. For unsupported devices, laptops/PCs with the Exam Browser application or iPhones/Macs with the SEB (Safe Exam Browser) application can be used.

The app is an innovative attempt to make smartphones useful for both learning and exams. However, for exams that require a locked screen, not all Android devices support it. The developers apologize for this limitation, which is beyond their control. Schools and teachers can use other options available or consult with the developers.

Overall, Geschool Secure Mode Only is a useful app for students who have phones that support locked mode. However, due to its limitations, it may not be suitable for all students.