When you share a photo you are not just sharing a photo, you are sharing your life(Where, when, who etc.), this new app will erase all this data from every photo stored in your device photos.This type of data is called exif data and we can erase some parts of it like the location from settings, but you can not remove the rest, so this app erases all the exif data of every photo stored in your device.
If you want to secure yourself and your privacy this app is for you!