Attributions
The open-source software this site is built with, and the libraries whose work appears on the page.
Updated
Price charts
Price charts on this site are rendered with lightweight-charts by TradingView, an open-source library used under the Apache-2.0 license. See https://www.tradingview.com/
Price history data
Price history on Amazon listings dated before July 30, 2026 — when this site began capturing prices itself — comes from Keepa, a third-party Amazon price tracker, and is shown on product pages alongside the site's own captures. The methodology page explains how it is combined with them. See https://keepa.com/
Open-source software
The site is built with React, TanStack Start and Router, Drizzle, Tailwind CSS, fumadocs-mdx, and other open-source projects, each used under its own license. Licenses are recorded in the project's dependency manifests and node_modules.
Social card fonts
The fonts rendered into the site's social cards — Figtree and Noto Sans SC — are used under the SIL Open Font License 1.1. Their license texts are committed beside the fonts in public/fonts/.