This app isn’t useful to me, because I don’t really understand the point. I don’t think I’m organized about my piggies’ care enough to be able to use it. If you really do want to track the health condition of your guinea pigs, however, this app could come in handy. Or if you have a sick pig and need to keep track of exactly what you fed it, what it’s droppings are like, and it’s weight to show to the vet or something. My one suggestion is that some of the info should be able to be marked as “unknown”, for example: I don’t know the exact date of when mine were born as I got them from someone who didn’t want them anymore. I could only guess they were at most a year old. But there was no option to mark that information as “unknown” which was annoying. Get this if you really want to stay organized with your guinea pigs, or if you have a lot to keep track of, maybe. But it’s not for me.