With the capabilities of Mylio it should be useful to organize all photo’s and video as it is done in the calendar view, in date folders! This makes it much easier to detect exact duplicates during import from different devices (besided capabilities of same picture, different meta data OR resolution).
Of course it makes it harder to view where it is sourced from, but if the APP will add a TAG to the photo with the device name, it becomes the same as copying them into separate folders. Of course, do not having duplicates differ per person. So may be an option which can set to allow duplicate creates from some devices.