Migration guide
Manual billing feels simple until sales grow. Bills are hard to search, stock depends on memory, discounts are unclear and the owner spends evenings matching cash.
The owner gets searchable bills, daily reports, stock movement and a path to cloud backup without losing the ability to bill offline.
Run a test day, print receipts, close cash and verify reports before making Posnic the live counter.
Keep a backup/export from the old method so old invoices and balances can be checked later.
Billing habits change only when staff know sale, return, correction, payment and day-close rules.