I built whosin.fyi to solve a simple problem - tracking team attendance and office presence. As remote and hybrid work becomes the norm, teams need an elegant way to coordinate who's coming into the office and when.
The app provides a clean, calendar-based interface where team members can quickly indicate their availability with three simple status levels: "Definitely", "Maybe", and "No". The visual design uses color-coded dots for quick scanning, making it easy to see at a glance who's planning to be in the office.
A useful feature is automatic scheduling - users can set recurring weekly patterns (like "I'm always in on Mondays and Wednesdays") and the app handles the rest. Individual calendar entries can still override these patterns when plans change, giving teams the perfect balance of automation and flexibility.
The tech stack is modern, and an experiment in what can be done with React RSC and server actions: Next.js 15 with React 19, TypeScript throughout, and SQLite with Drizzle ORM for type-safe database operations. Authentication is handled by Better Auth with magic links (no passwords required), and the UI is built with Radix UI primitives styled with Tailwind CSS.
Check it out at whosin.fyi if you're looking for a simple way to coordinate your team's office attendance!