A small tool for tracking birthday invites

I’ve been experimenting with a small side project after noticing a recurring problem whenever I helped organize events. Sending birthday invitations or event invites was never the hard part, the issue was always tracking responses. People would reply in different places (texts, WhatsApp, etc.), some would respond late, and others wouldn’t respond at all. It quickly became hard to know who was actually coming. So I built a simple tool focused on digital birthday invitations and RSVP tracking with one goal:

• keep everything in one place instead of scattered conversations.

It’s still early and pretty minimal, but it already saves me from constantly chasing people for updates. Has anyone here built something around event coordination or RSVP tracking before? How did you approach it?