PKJ - Pelengkap Kidung Jemaat is an Android application developed by Celfos. It is a free app in the Education & Reference category, specifically under the subcategory of Books. This app serves as a digital collection of songs from the book Pelengkap Kidung Jemaat (PKJ), which is commonly used in church services in Indonesia.

The main features of PKJ - Pelengkap Kidung Jemaat include a search function that allows users to find songs by song numbers, titles, or specific words and sentences in the lyrics. This makes it easier for users to locate the desired song. The app also has a "Favorites" feature that allows users to mark songs and access them quickly offline. Additionally, users can share songs from Pelengkap Kidung Jemaat (PKJ) through various social media platforms.

Overall, PKJ - Pelengkap Kidung Jemaat is a useful application for worship or daily use. However, it is important to note that internet access is required to fully utilize the app.