Geri Sayım Okul Sınav Sayacı is a free Android application developed by MRT Yazılım under the Education & Reference category. This app is designed to help users keep track of important dates and events, such as exams, appointments, and birthdays. The app features an online calendar where users can access pre-registered events, add them to their personal calendars, and receive notifications when the countdown is over.

In addition to the countdown feature, the app also offers useful information related to the upcoming events, such as historical facts and trivia. Users can also create their own notes for each event, and these notes are saved on their device's memory, ensuring their privacy. The app also has an anonymous section where users can share their thoughts on the upcoming events.

The app offers two modes, Light and Dark, and over 30 different colors for users to customize their experience. The app also allows users to sort their events alphabetically, by creation time, or by upcoming events. Users can also mark certain events as favorites and access them easily in the Favorites tab. The app also has a Past tab where users can access expired events, and a search feature to help them find specific events.