...Version 3.1 adds emailed invoices and reminders plus an .ics feed of due dates, all shipped switched off.
Also included: REST API with revocable keys, webhooks, an MCP endpoint for AI assistants, 2FA, OIDC sign-in, scheduled backups, audit log, dark mode. Plain PHP 8 + MySQL or SQLite, no framework, no build step. It never phones home.
A live demo runs on the product page - it opens signed in, with no signup and no password.