Compounder

Live site:

• https://compounder-hazel.vercel.app

Compounder is a local-first routines and streaks product built around privacy, consistency, and simple daily usefulness. The idea is straightforward: if a habit is meant to compound, the tool tracking it should not get in the way.

Each routine keeps its own completion history, current streak, best streak, and recent-window consistency so you can see what is actually building over time.

What it does

• Create routines with a title, cadence, and intention
• Track daily, weekly, and monthly completions
• Calculate current streaks and best streaks
• Highlight routines that are complete, due, or off-track
• Filter by cadence, status, and search query
• Edit, archive, restore, and delete routines
• Export and import data as JSON
• Persist everything in browser local storage

Getting started

npm install
npm run dev

Open http://localhost:3000. If port 3000 is busy, Next.js will automatically choose another local port and print it in the terminal.

Tech

• Next.js App Router
• React
• TypeScript
• Tailwind CSS v4

Why it exists

This project reflects a product instinct I trust:

• local-first by default
• no account creation when it is unnecessary
• clear value from the first minute
• software that tries to earn repeat usage instead of manufacturing it

Notes

• Data is stored locally in the browser, so it is currently device-specific.
• Existing compounders:routines:v1 local storage data is migrated into the newer app shape automatically.