OwnInvoice by Grit Software

What it does

Most invoicing software charges $20-50/month forever. After a year, you've paid $360 for something you could own. OwnInvoice is different: $199 one-time purchase, desktop app for Mac and Windows. Professional invoicing, quote management, 5 payment gateway integrations, email automation, and works completely offline. Built for freelancers and small businesses who want to own their software.

Grit Software builds practical desktop tools for small businesses and freelancers. No subscriptions. No cloud lock-in. Plus freelance IT, automation, and development services.

Practical tools for small businesses and freelancers. No subscriptions. No cloud lock-in. Plus freelance IT, automation, and development services when you need a hand. One-time purchase. No subscriptions. Your data stays on your machine. Professional desktop invoicing for small businesses. Create invoices, quotes, track payments, manage clients, and send reminders — all offline, all yours. Small business tech support, custom automations, and development work — on your terms. Remote IT help, troubleshooting, and computer setup for small businesses. Workflow automations using tools like Zapier or custom scripts. Custom software and app development built to your exact needs. Custom…from gritsoftware.dev

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  A $20/year invoicing tool for solo developers (simple, fast, no bloat)Dec 2025 · sidepay.app · ▲13

  Hi HN! I built a super lightweight invoicing platform for solo developers, freelancers, and one-person businesses. Most invoicing software costs $20–$40/month and is packed with features you don’t need. Mine is $20/year and focuses on the essentials: • Create invoices in seconds • Send invoices by email • Automatic email reminders • Recurring invoices • Simple dashboard for paid/unpaid tracking • No team features, no CRM, no bloat I built this because I freelance occasionally, and every invoicing tool I tried either felt bloated, overly enterprisey, or was way too expensive…

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