See in more detail the amount of your product stock, and see every purchase or sale. You don't need a barcode scanner to increase or decrease the number of your products, because, with the Android Application, you can scan barcodes quickly and efficiently.

Buy the source code Android + System management?
https://connectwithdev.com/store/products

Feature:
-Add user
-Delete user
-Register new user sent to email token
-Forget password
-Role user
-Edit user profile
-List Product
-Full API
-Export data to PDF or XLS
-Generate invoice
-Export invoice to PDF or XLS
-Dowload the barcode (EAN13)
-More

Get the system management from here
https://github.com/abedputra/Inventory-Stock-With-Scanner

Please follow the instruction from the above URL