Tilt Sensor (analog signal) to Iphone

I'm trying to find a way to upload tilt sensor data to an iphone. I would take the data and write code with it for my engineering project. My idea is to input the analog signal from the sensor into a device that will either convert the signal into bluetooth that could go to the phone, or convert the signal into digital and plug into a jack on the phone. Does this sound possible? If so what arduino products if any would help me do this? I am new to electronics and would really appreciate some advice.