Dex promises to help its customers “keep in touch, remember where you left off, and see everyone you know — all in one place.” It’s website further describes the product as “a 21st-century rolodex” that you can use to “set reminders, leave notes, and remember where you left off.” Dex shows you all of your past interactions with the people in your network in a single timeline. Dex has a chrome browser extensions that overlays on Facebook, Twitter, and LinkedIn, and a mobile app. Dex has a free plan and a $9.99 per month plan.