Could not use – Face Swap and Copy Free – Switch & Fusion Faces in a Photo Review

This is now the 2nd app I'm trying (free ones) to swap faces and I'm wondering is the apple crew is doing their job cause this one is useless too : can't choose 2 faces at one time so the app just doesn't work!!
Review by SFilmeridis on Face Swap and Copy Free – Switch & Fusion Faces in a Photo.