Like “Photo” app and “Camera” app pre-installed in iPhone, this app save edited PNG and GIF image data with Jpeg encoding.
Because PNG and GIF data don’t have Exif information regarding photo, it is impossible to show those Exif information even after the edit.
When storing PNG and GIF which doesn’t have Exif information originally, the date and device name became to be preserved with Jpeg encoded data in the upcoming version V1.71.
Current location data can be stored with your choice.
Please note that “Photo” app and “Camera” app pre-installed in iPhone do not preserve those data.