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PaidUp - Invoice Reminder SaaS
PaidUp is a complete, working SaaS that chases unpaid invoices automatically for freelancers and small agencies. Users add an invoice, pick a reminder schedule, and PaidUp sends a polite nudge before the due date, a friendly reminder on the day, and a firm follow-up when it is overdue, until the invoice is marked paid.
Created Oct 21, 2026 · Updated Oct 22, 2026
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ChatDesk - WhatsApp CRM and Invoicing
ChatDesk is a self-hosted CRM for small businesses whose customers live on WhatsApp. Your team answers customers from one shared inbox. When a job is done, you send the invoice as a PDF straight to the customer's WhatsApp. ChatDesk then reminds the customer before the due date, on the due date and after it: automatically, in your time zone, and never the same reminder twice.
Created Oct 3, 2026
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Invoice Automation System - PHP Invoice Generator
A lightweight, framework-free PHP invoice automation system that lets you manage clients, create invoices with line items, and send them directly to clients via SMTP email. Built-in automatic overdue payment reminders keep your cash flow on track without manual follow-ups. Supports both SQLite and MySQL, so it runs on any shared hosting with zero setup. No Composer, no Node.js, no framework — just upload and go.
Created Aug 28, 2026 · 1 like
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Repays
Introducing Repays – your ultimate ally in managing payments efficiently. Crafted meticulously with Flutter, Repays revolutionizes the way users handle their financial obligations. This intuitive app sends timely reminders for upcoming payments, ensuring you never miss a deadline again.
Created Feb 28, 2024 · 0 sales