I've bought, literally, hundreds of iOS apps, most in the photography/videography category. At some point in the not too distant past, I bought Fusion but failed to fully assess its capabilities. So it was ignored in my Camera folder. Finally, I methodically compared identical high contrast subjects taken with six different apps that claimed hdr enhancement. Fusion proved to be clear winner in producing high resolution merged shots capturing full tonality and detail! Plus, it offers all of the adjustments to achieve perfect shots. Really impressive! (Hope that the developer continues to upgrade this fine tool.)