Write complex Android app based on prototype

Need a developer to work on my app which consist of complex coding and tons of math. The app lets users use their smartphones TOUCH FREE. Please, read the description and let me know how do you think you will be able to overcome all the challenges? The app uses frontal camera of the phone and locates user's eyes and using the algorithm, "sees" where user is looking at the screen. The app can also see when user is blinking, therefore when user blinks, phone registers it as a tap. For example: user is looking at the Facebook icon, blinks and it opens. I currently have a prototype: it can detect eye pupils, knows where user is looking and can open apps. BUT there are several problems: 1) it works only on Android 5 and lower now. 2) it takes a lot of time for the process; it takes many tries to actually open the app. 3) it only works on the homescreen, but as soon as you open the app it doesn't work anymore, so you can't open tabs or links. 4) Programmer needs to figure how to make it work in low lights, under angles etc. I sometimes refer it to "technology" rather than an app because it is quite complex. So overall I want it to work fast, make it work for Android 7 and make it able to work "inside" apps.