https://play.google.com/store/apps/details?id=cloud.effiasoft.justbillingstd
Just Billing POS Invoicing App - Apps on Google Play
POS for Retail, Restaurant with Sales, Inventory, CRM, GST, Accounting
just billingon googleposinvoicingapp
https://docs.effiasoft.com/
Just Billing Documentation Center
just billingdocumentationcenter