What works with local data?
Customer, product, invoice, payment and inventory records are kept by the Windows application on the billing PC.
MyInvoiceDB separates local operational billing data from the online account services used for sign-in, downloads and the message wallet.

Customer, product, invoice, payment and inventory records are kept by the Windows application on the billing PC.
Customer, product, invoice, payment and inventory records are kept by the Windows application on the billing PC.
Google sign-in, installer downloads, wallet top-ups and WhatsApp/SMS/email sending use the customer web portal and messaging service.
A local-data workflow keeps routine billing records close to the desk while the portal stays focused on account administration.
Yes. After the one-time Google sign-in the app opens and bills fully offline. Internet is needed only for wallet top-ups, sending messages, Google Drive backup, Send to CA and app updates.
Today one PC holds one database with one owner login. There is no multi-user mode and no network sharing yet. A second PC can start from a backup, but the two copies will not stay in sync.
Sign in with Google, download the installer and start billing free. Add wallet money only when you want to send WhatsApp, SMS or email messages.