Si Yokca is a digital library application offered by DPAD DIY - UPT Balai Layanan Perpustakaan. It aims to promote reading habits among people and provides a platform for easy and quick borrowing, returning, and requesting books. With Si Yokca, members can explore thousands of titles and check the availability of books. The app also allows users to monitor their borrowing history and request a library clearance letter for graduation easily.

One of the standout features of Si Yokca is the "All Collection" feature that allows users to browse through thousands of titles available on the app. Users can select the titles they want to borrow and add them to their virtual bookshelf. The app also offers a "Library Clearance" feature that enables users to request a library clearance letter for graduation with ease. Other notable features include a virtual bookshelf to store borrowing and returning history, and a digital card that eliminates the need for physical membership cards.