Simple Invoice Maker App

This is an invoice generating mobile application. Here different invoicing related features are provided to user in it includes following:
POS(Point of sale): User can make receipt of their sold products and all necessary detail required for it.
Purchase: User can make receipt of their purchase products and all necessary detail required for it.
Income: User can make a receipt of his income in which source of income and all necessary details will be given by user to make receipt.
Expense: User can make a receipt of his expense in which source of expense and all necessary details will be given by user to make receipt.
Customer: User can create customer and can make a receipt against him for the his respective income or expense their.
Employee: User can create employee and can make a receipt against him for the his respective income or expense their.
Account: Account creation will give option user to receive or pay the credit on that specific account from other accounts(Income, expense, employee or customer).
Vendor: Here in this option user can create vendor.
Process Type: Here in this option user can create the process type. In process type we describe what product is converting to which product than the required steps to do this process, its quantity, supervisor, worker charges and description is provided.
Product List: In product list user can add his product with the information of it category, unit, purchase price, sale price and stock and its images also whereas we have given some more option to user for product adding feature like is sale active or inactive, is stock active or inactive, is purchase active or inactive and is status active or inactive than after that user provides the product name and the product is ready to publish for its respective purpose.
Transaction List: In transaction list user gets the details of whole POS, purchase, income, expense etc. To get the transaction list user enter the start and end date of required data he wants to get and than after that a specific category is selected list customer, account, income, expense, vendor, employees etc and than after that user select the person with whom he has done the transaction and wants to see the detail and record of that transactions.
Other Features: User can send the receipt to WhatsApp of that specific person with whom he is doing the transaction and same as printing option is also given mean a user can also print his receipt if he wants too.