I just added the app to my iPhone and it works a little bit different.
To access your photos click on the image of a person on the bottom right and this will bring you to your images. Once you can see your photos touch one which will bring you to a screen with only the selected image. Next click on the arrow in the upper right corner and a screen will appear with options to share the picture. Hit the button that says copy link and you can then paste the link to another location as normal.
Hope it works for you.