cRc Kosher is a free iPhone app developed by AA Rosenbaum Services Ltd. It is designed to make shopping for kosher products easier for the kosher consumer. The app includes updated kosher product lists, the cRc's Fruit and Vegetable Guide, and a searchable listing of over 80 Kosher agencies worldwide recommended by the cRc.

During the Passover season, cRc Kosher provides valuable information for preparing and shopping for the holiday. It also offers additional features such as a Berachos guide for recitation of the proper blessings before eating, a guide to Kashering, a Chicago Area Kosher restaurant guide, Slurpee listings, and a Tevillas Keilim Listing.

One of the standout features of cRc Kosher is the ability to "pull" and refresh data within the app at any time, ensuring users have access to the most up-to-date information. With its comprehensive features and user-friendly interface, cRc Kosher is a must-have app for anyone who follows a kosher lifestyle.