To copy a GEDCOM file to your iPhone, iPad or iPod touch use Apple iTunes, which can be downloaded for free from www.apple.com.
Connect your iOS device to your computer and open iTunes and select your iDevice on the left side of the navigation menu.
Open the FileSharing section
Select MobileFamilyTree The documents currently stored on your iDevice will be displayed at the right side under "FamilyTreeDocuments".
Import or export the file
Click "Add.." to add a new file to MobileFamilyTree 9 or click "Save To…" to save a file from your iDevice on your Mac.