The main target group of Join-In are 70-85 years old people with a wish for social contact and activities, but also older individuals who have little computer knowledge and want to get acquainted with computing in a safe surrounding. They can use it for socialising and for keeping in contact with their friends of families. Seniors who know the importance of regular exercises can use the extensible social and cognitive (exer-)gaming platform of Join-In for maintaining their well-being and for preventing illnesses. A moderator modus allows the presence of a person to help connect the seniors and to offer special services like life exercises. Especially this feature allows senior centres and other organisations easy access to their clientele.