There are a lot of sync tools out there that work with image and video files. The thing that is lacking is a sync tool that exclusively caters to the needs of an amateur photographer or someone that deals with a lot of digital photos or videos.
Cameras give default names that are completely meaningless to photos and videos, which are an eyesore. Also, your photos might be scattered in many different locations and you might want to group them to your preference. Additionally, while using a sync tool, you might want to view the photo or video first before confirming an action on it. Hence there is the hassle of opening another program to view it.
In addition, hardware failures do happen and your PC might crash, deleting all your photos inside. If you're unlucky enough, your thumbdrive or harddisk might suddenly be faulty also. Hence we aim to give users an option to ensure there are 2 copies of a photo or video at all time, each in a different PC. If both your PCs do crash at the same time, we think you are the most unfortunate person in the world.
Who needs DoubleSnap?
For people who store their photos and videos in PCs, laptops and other digital storage devices, meaning technically, in this day and age, everyone.