Bliscy Krewni is an Android application developed by RCKIK w Katowicach, designed to help blood donors associated with the Regional Blood Donation and Blood Treatment Center in Katowice. The app aims to streamline the blood donation process and provide access to discounts offered by local restaurants.

With the app's essential features, users can easily connect with the RCKiK database and keep their activity journal. They can plan their blood donation schedule, get reminders for upcoming donations, and find nearby blood donation points. The app also provides convenient options for travel.

Users can stay current with important events related to blood donation and visit the "Lokale Bliskich Krewnych" to take advantage of coupons offered by the center's supporting restaurants.

To access all the app's features, users need to register with their donor number, which they can obtain from any blood donation point affiliated with the Regional Blood Donation and Blood Treatment Center in Katowice.