Build me a app

App for our retail store
I have a apparel retail store

Using busy accounting software in access database
I want to link this app to get the realtime data
For employees to get inventory and for clients for e-commerce
First i want to use it for inhouse inventory management

The features i want is

1 give predefined credentials to employees from managementpanel in windows
2 user registering themselves in our app to access who are our customers and creating. their account in our software or preload if account exists
3 for employees i want one panel where they can scan a barcode, know how many pieces available in which material center, also give a image option in which they can see that image of scanned product.
4 if image not available give them the option to upload the image by click a picture like myntra which make the background white and displays the product. Which will be saved in our server pc by the barcode scanned name.
5 when image scanned show the category tagged, if not tagged give option to tag which will help in future to e-commerce
6 location tracking of the employees device.