Iphone in Itunes app count is off by 1

When I go into Itunes and click on my Iphone, under apps it says I have 131 apps. I've counted my apps and I only have 130. When I exit my iphone and go to my itunes library it says I have the correct number of apps 130 installed in my computer. So I thought maybe I've just counted wrong, so I've transfered purchases, synced my iphone, and updated all apps. It still says on my Iphone that I have 131 apps even though when I count them there's only 130. Why is my app count off by 1 on my Iphone but correct in my itunes library?