New mobile app startup Piddas21 today launched Piddas21 RemotePlay, an app that allows users to instantly share videos, photos, music and documents in real-time across multiple mobile platforms with any other user.

“We like that people can interact on their mobile phone or tablet,” says Joe Lin, founder and CEO of Piddas21, a subsidiary of the world’s largest notebook original design manufacturer (ODM) Quanta Computer. “You can instantly broadcast any media [type], and then you could push it to other devices instantly.”

Piddas21′s RemotePlay app is said to be the first mobile app to allow users to instantly stream content to another user that has the app installed, Lin says. He adds that a few scenarios where RemotePlay is useful includes sharing a video with friends at a cafe, a document between students in a college lecture hall or a family expense document between a husband and wife. The content a user can share can come from photos and videos on their device’s camera roll as well as from other apps like documents stored on Dropbox or a pictures stored on Facebook.

Breaking down the app’s UI, at the top, a user will see a list of devices that are connected on the same Wi-Fi connection. On the bottom, users will see a breakdown of the different media types such as pictures, videos, music, Flickr pictures and documents that can be shared instantly. To share content, users simply drag-and-drop the content either to one person at a time or multiple people simultaneously. Once content is shared, a control panel pops up, which allows each user to play, pause, replay or sync the content in real-time on all devices.

The app also enables users to see what apps and devices other users are using. Piddas21 calls this “presencing information.” Once a user is done sharing a piece of content through RemotePlay, it disappears from the recipient’s device, which keeps the original content in the possession of the sender while not taking up any storage space on the recipient’s mobile device. There are privacy settings implemented into the app so a user can specify whether or not they want to be promoted if someone requests to share content with them.

The technology behind the app allowing the Taipei-headquartered Piddas21 to identify devices who are using RemotePlay on the same Wi-Fi network is a lightweight protocol with HTTP. RemotePlay doesn’t use existing media sharing standards like DLNA or UPnP because those standards can’t discover devices well, Lin says.

RemotePlay is offered in two flavors — free with ads and a pro version for $1.99 with no ads. The app is available now for Android, in a few days for iOS and in a few weeks for Windows Phone 8.