inventory- invoice

This app is the client of a mac app https://apps.apple.com/us/app/id1372437743?mt=12
you can install it in the MacBook .and then set the MacBook 's ip in this app.
it will show all the data on the MacBook's app. also can  submit data to the MacBook server.
If you dont't want to install the MacBook's app . it default connect to a clound server is free to use.
connect to MacBook'server  show data and submit data is fast then the default server.
1.inventory invoice 
2.manage product sell purchase 
4.manage shouldpay 
5 trend
6.manage supplier customer