Somebody
It's called Somebody, and July released it at the Venice Film Festival with a short film branded by the fashion line Miu Miu.
Somebody is available for free for in the iTunes Store (sorry, Android users).
Here's how it works: You use the to send a message to a friend, but you also need to include actions and directions for delivering the message, because it won't be delivered electronically to your friend. Instead, the message gets picked up by a user nearby your intended recipient.
You can choose the delivery person based on their photos and the rating they have from other people who have previously elected to use that person as a courier.
The delivery person and your friend are given one another's picture and GPS-based location so they can meet up. This delivery person, who's likely a total stranger, will deliver your message verbally. You'll get notified when your message is delivered. The messaging service only works if your friend is available.
If it's not a good time to receive a message from a total stranger - or if there's nobody available to deliver your message - your message will be "floated." People who wish to act as messengers can browse the "floated" messages and deliver one.
It's part social experiment, part messaging app, and part performance art.
"I see this as far-reaching public art project, inciting performance and conversation about the value of inefficiency and risk," July said in a press release.
Somebody
July is best-known for her writing and directing, most famously in her 2005 movie "Me and You and Everyone We Know," as well as her performance art.
For July's 2013 performance art piece We Think Alone, July asked Kirsten Dunst, Lena Dunham, Kareem Abdul-Jabbar, and other friends to share private email correspondence. Subscribers received weekly email newsletters from July with the celebrities' topical, private emails.
July's explanation for Somebody is what makes it different from other quirky messaging apps.
"The most high-tech part of the app is not in the phone, it's in the users who dare to deliver a message to stranger," according to Somebody's press release. "Half-app / half-human, Somebody twists our love of avatars and outsourcing - every relationship becomes a three-way. The antithesis of the utilitarian efficiency that tech promises, here, finally, is an app that makes us nervous, giddy, and alert to the people around us."
Somebody likely won't dethrone messaging apps like Snapchat and WhatsApp, but it's nevertheless an interesting experiment in human interaction.
You can watch July's Miu Miu-partnered video for her Somebody app below: