All the photos on Foap are uploaded from the mobile app, so you’ll have to export your camera photos to your phone where you have installed Foap.
If you want to upload photos using your PC, you can use the BlueStacks mobile apps' emulator for PC in order to launch Foap app on the PC and use it in a normal way. Here's a link http://www.bluestacks.com/. That's the only way for now...
We'll do our best to add this feature in the future, sorry for temporary inconvenience!