Overview

Zero-backend. Zero-server. Zero-cloud. Just your data, in your browser.

I built Macadam because most financial tools are either too complicated or too eager to harvest your data.

After making the GigWorker Earnings Tracker, I realized I needed something truly frictionless. No subscriptions. No cloud databases. Just an app that opens instantly, lets you log expenses on the subway with no signal, and keeps your data strictly on your device.

It’s literally a single folder of HTML, CSS, and JS. Zero build steps. If your device has a modern browser, it runs Macadam.

Launch Macadam Web App

Here’s what makes it tick.

Frontend

Vanilla HTML5 and CSS3 (Bootstrap 5). No framework bloat.

Database

IndexedDB via Dexie.js. Fast, local-only storage.

Visualization

Chart.js for analytics you can actually read.

Runtime

Vanilla JavaScript and Service Workers for a true offline PWA.

Dive into the architecture and setup.

Getting Started Quick setup guide and installation.

Architecture Deep dive into the zero-backend model.

Data Model Understanding the IndexedDB schema.

Offline Strategy How the service worker manages cache.

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Grab the source code or contribute on GitHub.