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Software · Office & notes

Invoice Ninja

Create invoices, accept payments, track expenses & time tasks.

  • Free, with trade-offs
  • Linux and Android
  • Open source

Overview

Invoice Ninja is an invoicing program, available on Linux and Android.

Features described in its F-Droid listing and on its official website: reminders and due dates.

Overview written by LicitPro from the documentation published by the authors and the cited sources; we have not tried the resource ourselves.

Excerpts that establish this information
  • “Free invoicing software for freelancers and small businesses.” — official website, 10 November 2026
  • “Automate payment reminders & past due notifications.” — F-Droid, 10 November 2026

At a glance

Invoice Ninja is free, with trade-offs: it relies on a non-free online service.

Its licence could not be established at the source: check the terms on the official website.

Plans and conditions

  • Free plan: basic features are free; others are reserved for paid plans.
  • Paid subscriptions from 11,67 $ per month (price read on the official page).

Strengths

  • Open source code
  • No advertising

Weaknesses

  • Flagged by F-Droid: relies on a non-free online service

About

Create. Send. Get Paid. Invoice Ninja is a leading platform for SMB’s to invoice, accept payments, track expenses & time billable-tasks. Designed for freelancers and small to medium size businesses, Invoice Ninja is a suite of apps to help you get paid. • Incredibly easy to use: Invoice Ninja was built to serve freelancers and business owners with a complete suite of invoicing & payment tools to advance your business. • Invoicing & Payments: Every feature is geared towards accurate and secure invoicing and getting you paid. With Invoice Ninja you can send beautiful branded invoices with minimum of effort and maximum professionalism. • Time Tracker & Projects: Create projects and individual tasks per project. When done, simply “Send task to invoice” and all details will be sent ready for your clients to pay! • Track Vendors & Expenses: With Invoice Ninja, all your earnings, expenses, clients and vendors are stored and managed in one system. Categorize your vendors & re-invoice expenses to clients, or simply run expense reports. All of these features combine to help you receive the money you deserve and reduce the amount of time you spend on repetitive invoicing tasks. Spend less time on paperwork and more time at your craft.

Description from Flathub — AppStream (Flathub)

Sources and checks

  • Facts collected from Flathub (credit card, source code, publisher, licence, free status, platforms, commercial use, version) —
  • Facts collected from Official plan pages (pricing, licence, terms) (limits, free status) —
  • Facts collected from F-Droid (credit card, source code, publisher, licence, free status, platforms, ads, commercial use, version) —
  • Last technical check: 7 November 2026
  • Description from Flathub — AppStream (Flathub)

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