The short answer is, no, you cannot just upload pictures previously taken with your camera app and load them into your SNAP App. You have to use the SNAP App to take pictures of the room in order to properly capture the room for the adjuster. Using the SNAP App will ensure that your pictures are looked at by the appropriate person as well as ensuring that the dimensions are properly captured. If you need help on how to properly capture a room using the SNAP App, check out this article.
If you have more questions regarding the SNAP App, please check out the answers to the most frequently asked questions about the app in our learning center located here.