Motion Stills isn't just an app that converts a Live Photo to a GIF. As seen in the video below, it uses Google's video stabilization technology to smooth out jittery images and freeze backgrounds with some impressive-looking results.
In addition to serving as a tool to convert Live Photos into GIFs and videos that can be quickly shared on social networks, Motion Stills is also useful simply as a tool to view Live Photos. In Apple's Photos app, there's no dedicated folder for Live Photos, so they can get lost among other images.
Live Photos are viewable on Apple devices running iOS 9 or later or OS X 10.11 or later, and Apple has made an API available for developers to build Live Photos support into their apps, but there are no built-in tools for editing Live Photos or converting them to other formats.
With no native tools available, Motion Stills fills a major Live Photos void. The app isn't perfect, has a few bugs, and works better with certain types of subjects, but overall, it's well worth checking out if you have a device capable of capturing Live Photos.
Motion Stills can be downloaded from the App Store for free. [Direct Link]