Ακάθιστος Ύμνος Χαιρετισμοί is an Android application developed by Michael Chourdakis that provides a collection of hymns. This app is exclusively available in Greek. The app's purpose is to help users with their prayers by providing a comprehensive collection of hymns. The app is free to download and use.

The application has a simple and user-friendly interface that allows users to browse through different categories of hymns. Users can also search for specific hymns using the search bar. The app allows users to bookmark their favorite hymns for easy access in the future. Overall, Ακάθιστος Ύμνος Χαιρετισμοί is a great app for those looking for a collection of hymns to help them with their prayers.