Imagine having a dedicated app designed specifically for you and your partner. Upload images, create to-do lists, cross items off the list, send private messages and more. Well, now it's a reality; there's a new-ish kid on the block and it calls itself the couple app. Avocado is one of the most recent in the line of couple apps, developed by ex-Google employees, Chris Wetherell and Jenna Bilotta. With the Avocado API developers will get a chance to see what they can create.