This is actually version 2.0 of the old LinkedIn Contacts app, but it's overhauled with new "anticipatory functionality" like reach out reminders and Refresh-style profiles to help you stay in touch with people you're connected to. The unbundling trend continues...

Looks like they've relaunched this app. Didn't realize there was a predecessor. Seems pretty slim right now. Just a more visually appealing way to view alerts. Tried syncing with calendar and enabling message notifications, and nothing happening.