Mobile development

I need an Android app. I already have a design for it, I just need it to be built. This app will be used for data collection about human body shapes for medical purposes. The app will take pictures of a human subject in a standardized way. The phone will be kept against a wall on the ground at a particular angle. A feedback on angle will be provided to the user until it is adjusted in the preconfigured range of angles. Then the person will need to stand at about 6-7 feet away, fitting himself/herself into a silhouette frame on the screen. Once app finds it stable it starts taking high resolution pictures/videos and voice guides the subject to rotate around slowly at the same position with some up in the air. Once captured, the app will voice notify and thank the user and ask him/her to fill up a form with certain details such as height, age, weight, waist, wrist etc sizes and submit. All the data must be securely stored in a central server. A background voice will guide the user through the entire process. Some validations will be done at all steps and at the end and user nay be asked to redo if something incorrect. The same subject's data will be collected 3 times.