If you are looking for this specific version, you are likely seeking these professional-grade editing tools:
: Precise masking tools to cut out foreground objects. If you are looking for this specific version,
: This specific version (targeting iOS 12) is dated. Modern versions of Superimpose X are available on the Official App Store and offer better stability on current iPhones. If you are looking for this specific version,
: Ability to save cutouts as "Stamps" for future use. If you are looking for this specific version,
: 18 different blending modes to merge two photos.