This app makes your selfies look ... complete

Source: Frontback App

Give that selfie some context.

That's the idea behind a month-old mobile application that lets you snap two photos—from your iPhone's front and back cameras —in a single post.

Appropriately called Frontback, it accesses the back camera for the top half of each photo and the front camera for the bottom half. Put those two photos together and a viewer has a more complete picture (excuse the pun) on what both the photographer sees and the actual photographer.

The iPhone app, whose motto is, "You, and what you see," has been downloaded 200,000 times since its launch July 21, quickly earning itself a top 100 ranking in 42 countries.

It also has a handful of famous users.

Twitter co-founder Jack Dorsey, has taken a liking to the application and posts Frontback photos frequently. Actor and entrepreneur Ashton Kutcher is into it, too.

While there are few social features, users can sift through photos the Frontback staff has highlighted and "like" them. Registered users can also share their snapshots on Twitter, Facebook and Instagram.

Similar to Twitter and video-sharing app Vine, Frontback appears to be fun because it forces user to be creative within its constraints.

It also gives photos context.

Former Instagram designer Tim Van Damme told Frontback co-founder Frédéric Della Faille that "[a Frontback photo] tells so much more than a photo on Instagram."

Della Faille commented to TechCrunch's Romain Dillet that "two photos changes everything."

Will Instagram send Frontback into oblivion if it decides to add a two-photo feature to its super popular photo app? It wouldn't be far-fetched. Many say that Vine's success spurred Instagram to add video posts.

Della Faille, founder and designer of Frontback, tells in an email that Instagram would make users' experience worse if it offered the ability to upload a photo, video and a Frontback-like feature. People want to create and consume a single form of media, he said, and bunching it all makes discovery "messy."

When asked whether Frontback has been in talks to be acquired by a company such as Twitter, Della Faille said that his team's "priority and focus is on building the product."

Twitter scooped up Vine for a reported $30 million after Dorsey and company liked what they saw. A Frontback acquisition could give Twitter the photo-only application it has been seeking since Facebook beat it to Instagram.

Della Faille said a new version of Frontback will be released in September that will let users find and follow friends. There will also be an Android application at some point.

Will Frontback turn out be a fad? We'll know before long, but for now, here are 20 absolutely fantastic Frontback photos.

Written by CNBC's Eli Langer. Follow him on Twitter at @EliLanger.