Your comments

It'my fault. My English doesn't help.
Scenario : 1 iPhone, camera roll empty. 1 iPad camera roll only one photo.
I send from iPad to my iphone, my unique photo. Ok. Well done.
If I repeat the process. In my iPhone I obtain two equal pictures. And so on. Three equal photo, four equal photo. And so on
I think that the app should say a message like 'photo(s) already present, overwrite? Overwrite all? '
Without this alert it's impossible not have duplicate if you have a lot of photos.
Hope you understand me.
Thanks for support.