We've already given you some tips on apps related to Live Photos here on the website:
Today's tip o Live Studio, developed by Aaron Satterfield, which promises to be the most complete of all.
It is a solution that combines the functions of some of the apps we covered above, separately. It can convert Live Photos into videos or GIFs, as well as doing the opposite process by transforming videos, GIFs and even sequential photos (burst) in Live Photos. And all of this directly from iPads or iPhones / iPods touch, with shortcut support via 3D Touch.
The Live Photos created by the app do not have sound, but this is not a big problem as many people like to use them as animated wallpapers on the iPhone 6s / 6s Plus.