This app was mentioned in 5 comments, with an average of 1.20 upvotes
fwiw, camu has proven awesome as a replacement for the stock sony camera software, especially if you want to use your phone point and shoot-style.
https://play.google.com/store/apps/details?id=com.sumoing.camu
I have the OPO, but I noticed most people here are saying they use stock camera so I thought I'd suggest Camu. Just recently switched to it because I was having trouble with stock camera on the OPO. It's pretty simplistic but has some fun filters and such. Google Play