The JoomlaXi's Profile Completeness addon for JomSocial (JSPC) is going to be a killer feature for your JomSocial based website. This addon help you to show the user's profile completeness on their profile page. This way you can motivate your user's to complete their profile. This also guide them to the process of completeness.
JSPC come in a bundle of Component + JomSocial Application + Module. The component allows you to define every aspect of completeness. While using plugin you can show it to user's profile.