I'm interested in iphone app with posibility of make the envoirment with the same app without use PC.
The easy form is make an app with buttons options and in the button write manually the comand for send "GET" or other commands for example: http://192.168.10.254/?cmd=C (i use this simple config for send commands to relays or another aplications for home automation but for iphone i dont know an app for make this)
I think it's easy and dont need libraries for use it and only need Arduino with one ETH shield.