Invoice Ninja
Invoice Ninja is a free, open-source budget and finance app for Android and iOS. Invoice your clients, accept payments, track expenses & time billable-tasks. It has 1,754 GitHub stars and is released under the AAL license, and you can install it from F-Droid, Google Play and the App Store.
About Invoice Ninja
200,000+ businesses trust Invoice Ninja. And it's 100% free! Create invoices, track payments, vendors, expenses, and time billable-tasks & projects. * Invoicing, Quotes, Credits, Payments * Product Library, Client Management * Project & Task Management, Time-Tracking * Full Persistence, 2FA, Google Login Pro & Enterprise Highlights * Unlimited Clients, Invoices, Quotes * Email invoices & quotes via your Gmail account. * Attach & embed 3rd party files to client invoices & emails Intuitive business dashboard * View revenue, invoices sent, recent activity data. * Track upcoming invoices, invoices past due, more. Invoice Clients in seconds * Create clients and send an invoices in seconds.
Privacy and F-Droid
F-Droid builds Invoice Ninja from its published source code and flags anti-features such as ads, tracking or reliance on non-free services.
- Relies on a non-free network service
Screenshots
Screenshots from the app's F-Droid listing.
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What is Invoice Ninja?
Invoice Ninja is a free, open-source budget and finance app for Android and iOS. Invoice your clients, accept payments, track expenses & time billable-tasks. It has 1,754 GitHub stars and is released under the AAL license, and you can install it from F-Droid, Google Play and the App Store.
Is Invoice Ninja free and open source?
Yes. Invoice Ninja's source code is public on GitHub under the AAL license, which is OSI-approved or FSF-free. F-Droid flags these anti-features on its latest build: relies on a non-free network service.
How do I install Invoice Ninja?
You can install Invoice Ninja from F-Droid (package com.invoiceninja.app), from Google Play and from the App Store; the links are on this page. Its GitHub repository also publishes releases (latest: v5.0.194).
Is Invoice Ninja still maintained?
The repository's most recent commit was on May 14, 2026. Its F-Droid listing was last updated on May 14, 2026. appsgit only lists apps whose repository had a commit in the last six months.