It's a pretty spartan site - no bells and whistles - but I found the core utility to be very useful. You can send pictures based on motion detection, at intervals, on button press, or on a 5 second countdown.
It works on mobile as well (or at least on my Android 4.4 phone), although it doesn't have a responsive layout and you have to zoom in a bit to select options and get it set up. Still, it would work as a free/impromptu security camera in a pinch.