GS EXT vs EZ Invoice Generator

GS EXT is a mobile client used in conjunction with the Grandstream GRP260X series phones, providing simple and fast programmable buttons to record various communication needs in office scenarios, making it convenient for users to operate communication functions with one click.

The complete invoicing solution — right on your device, fully offline. Generate professional PDF invoices in seconds, manage clients, track payments, and print or share invoices — all without an internet connection. Key Features: Easy Invoice Creation - Quickly generate invoices with customizable fields - Add multiple items with descriptions, units, and rates - Automatically calculate totals and taxes Client Management - Store and manage client information - Reuse clients across invoices to save time PDF Invoice Preview & Export - Instantly preview invoices as professional PDFs - Share or print directly from your device Import & Export Data - Backup or transfer your data with simple import/export tools - Never worry about losing your records Print Invoices Instantly - Connect to any AirPrint-supported printer - Get physical copies of invoices on the spot - 100% Offline – Your Data Stays With You - Works without Wi-Fi or mobile data - Your information is private and stored only on your device Perfect for freelancers, service providers, shop owners, and anyone who needs quick, reliable, and offline invoicing.