TL;DR: The thing that finally pushed me over the edge was discovering that my CGM app stores readings in a proprietary format, exports as a PDF (a PDF ), and wants $12/month to show me a 90-day trend line. That's data my body generated.

📖 Reading time: ~35 min

What's in this article

Why I Built This Instead of Using an App

What You'll Actually Build

Project Setup: From Zero to Running Dev Server

The Quick-Entry Form: This Is What You'll Use 4x a Day

Building the Trend Chart with Recharts

Stats Panel: The Numbers That Actually Matter

Deploying to Firebase Hosting: 5 Minutes Flat

Rough Edges I Hit (And How I Fixed Them)

Why I Built This Instead of Using an App

The thing that finally pushed me over the edge was discovering that my CGM app stores readings in a proprietary format, exports as a PDF (a PDF ), and wants $12/month to show me a 90-day trend line. That's data my body generated.…