Filepicker.io is the parent company of INK and a product that every developer should be using. We were lucky enough to be part of the team that worked on their next generation mobile product. Ink is a iOS framework which allows developers to move files and data from one iOS app to the next. The ability to free your files from the restrictions that iOS places on them and lets you use the apps you want to do the things you need to do. Check out the video to see what the system is capable of.
We would love to chat with you and see if we can work together.