The Iglesia Ni Cristo SL App is an educational and reference program designed for the iPhone platform. Developed by Carl Te, this free app is a project of the Christian Society for the Deaf under the Christian Family Organizations Office of the Iglesia Ni Cristo (Church Of Christ). It aims to provide a comprehensive sign language resource for both INC members and non-members who are deaf or interested in learning sign language.

This feature-rich app offers over 8000 vocabulary entries, all presented in video format. The vocabulary is categorized into everyday signs, including the alphabet, numbers, colors, greetings, and more. Users can easily navigate through the app and maintain their own Favorites category. Additionally, the app provides examples of signed phrases and sentences, allowing learners to practice and improve their signing skills.

One of the notable features of the Iglesia Ni Cristo SL App is its offline accessibility. Users can access all the features and content of the app without requiring an internet connection. The app also offers a quick search function, allowing users to easily find specific signs or phrases. The video playback is fully controllable, and there is an option for video auto-looping.