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Zoho Invoice vs G8 Invoicing: catalog facts
Zoho Invoice	G8 Invoicing
Free Free to use; payment gateway fees may apply.	Free Free and open source under the GPL-3.0 licence.
Windows, macOS, Android, iOS, Web	Android
Free invoicing with online payments and reminders Apps for mobile and desktop as well as the web	Converts quotes and delivery notes into invoices Exports PDF, Factur-X and CII-XML
Invoicing only; full bookkeeping needs a separate accounting product Requires a Zoho account	Small project with a limited user base Android is the only documented platform
Downloadable app, Web application, Hosted service	Downloadable app
Closed source	Open source
License not stated	License: GPL-3.0
Account needed	Not stated if an account is needed
Not stated if it works offline	Not stated if it works offline
Official website Full listing and sources Checked October 2, 2026	Official website Full listing and sources Checked October 2, 2026

Catalog facts only. Anything “not stated” is unconfirmed. Check full listings for details.