I mostly stuck around campus while I was looking for tracks, specifically the parking lot between the medical center and aiken complex. It was pretty easy to use the app, and I got three pretty good tracks:
1) Raccoon
I thought that this track was likely a raccon for several reasons. First, it fits into the size range of 6-10 cm, coming in somewhere around 8. It also had 5 clawed toes, which are a little hard to see in the picture, and a long heel of the palm, which fits the general shape of a raccoon track.
2) Red Fox
This one I was a little less sure about. I went with red fox because of the size range (~5.5cm) and the 4 toes, but the thing that really stuck out to me was the way there was a circular indent all around and somewhat obscuring the toes. However, I have a sneaking suspicion that this one is really just a pet dog.
3) Coyote
This track is a little bit small to be a coyote (only about 6cm), but the distinct way the two front toes pointed in towards each other. The only other track with toes like that was the wolf, and this is definitely too small for that.