The GoPro App lets you control your camera remotely, preview shots and play back content on your smartphone or tablet. Plus, it makes it easy to share your favorite photos and videos.
There's no sharing option within the GoPro app. Instead, you save the picture or video file to your mobile and share the files like you normally would from your device.
Don't forget to also update your GoPro Hero 3 camera, which can be done through the official GoPro website here: GoPro product updates