Flutterby is a phone-first butterfly logging application aimed squarely at UK naturalists and citizen scientists. Built with a modern stack — React on the frontend, Fastify on the backend, and Neon (serverless Postgres) for storage — it lets field observers record butterfly sightings from their phones and automatically converts GPS coordinates into OS grid references, the standard geographic notation used by UK biological recording schemes.

What makes this repo interesting isn't just the domain — it's the thoughtful intersection of niche scientific tooling and a genuinely modern web stack:

• Phone-first design: Rather than shoehorning a desktop app onto mobile, the project starts from the assumption that logging happens in the field, one-handed, possibly in bad light.
• Automatic OS grid conversion: Ordnance Survey grid references are the lingua franca of UK biodiversity records (used by iRecord, Butterfly Conservation, BRC). Automating this removes a real friction point for volunteer recorders.
• Serverless Postgres via Neon: A pragmatic choice for a hobby-scale citizen science app — cheap when idle, scales when a good butterfly season hits.
• Fastify over Express: A signal that the author cares about performance and schema-driven API design.

This would be genuinely useful to amateur lepidopterists, butterfly transect walkers, and anyone contributing to schemes like the UK Butterfly Monitoring Scheme who wants a lightweight personal log alongside official recording apps. It's also a great reference project for developers curious about PWA-style field data collection, coordinate system transformations, or building small-audience scientific tools with modern TypeScript stacks.

Zero stars today, but there's a real user base for this kind of tool — and the tech choices suggest someone who'd welcome contributors.