Thanks for getting back to me Samer.
does it just need enabling in the plugins? I tried this but the app wouldn’t connect. I’ll try again when I’m on the same network.
I also tried installing as described in these instructions http://rayshobby.net/a-mobile-web-app-for-opensprinkler-and-opensprinkler-pi/
but I get an error:Settings have not been saved. Check IP and Port settings and try again when trying to configure