잼ZEM-아이용 SKT is a smartphone application designed for SK Telecom customers under the age of 14. With ZEM, children can plan their smartphone usage habits, make promises to their parents, and earn rewards for keeping their commitments. The app encourages responsible smartphone use by allowing kids to track their usage, set limits on apps, and earn free mode coupons for extra screen time.

ZEM offers features like setting usage plans, earning rewards through promises kept, and collecting Jam Cones to exchange for desired gifts. It also provides a family connection feature where up to 5 family members can participate, including chatting with JamTalk. Parents need to install the 'ZEM for Parents' app to connect with their children using 'ZEM for Kids'.