Build Calculator app by React Native

I Need to create an Andriod and IOS mobile app that is a simple calculator. Must add, subtract, multiply, divide, have 8 digit place value, and some very basic memory functions. For computations larger than 99,999,999, must show "ERROR", and show "0" for values below 10^-7. The Transfer display button will be non-functional. Included is a mock-up of calc. Help button needs to pull up a help screen that is attached. Next to display window, an "M" will show when a number is saved in memory, and will disappear when no number saved in memory. MR is memory recall: displays saved number MC is memory clear: erases memory M+ is memory sum: saves number in memory if none already. if number already in memory, adds displayed number to memory and stores that sum in memory C is clear all CE is clear last entry If my description isn't clear, this video covers it [login to view URL] When app opens, initial screen will look like opening screen pdf attached. Pressing calc button opens up the calc app. After installation, app will ask for name and email address in order to send link to a video explaining GRE calc strategies and tips, after they enter, will send us that data. Attached is the help page in powerpoint that will pop up when help button is pressed. I need someone to finish it in 5days. It is a simple project. startup page(opening screen), login page, calculator page. Only developer with experience bid on this project.