Android App Integration

Hi Team,

I am new to Arduino. I can see the Android app ArduinoDroid for Android. I have my own app which requires Arduino integration. Please advise how to integrate Arduino into my Android (or iOS app) app. I spent a week to search, but I can't find any hello-world like app.

web search for 1Sheeld there is a board and lots of what you are looking for. You will need the one shield board which works great