I am currently working full time with a company called variable inc., who makes a product called NODE. There contain 3-axis accelerometer, and gyroscope. I am working on an app that uses both of these readings for activity recognition, I also very much understand these readings instead of just understanding how to retrieve them.
I am very experience in IOS development, and IOS's Core Motion Framework, which is the framework I will be using to development this project.
I can develop an app for you in about 2 days, that can display real-time accelerometer data, as well as make a sound when any thresholds you specify are met.
Thanks!