# ArcWatchtower

> ArcWatchtower is a website change monitor for Google Chrome and compatible browsers (Edge, Brave, Arc). It watches any web page, page element, feed, or JSON/API endpoint for changes and sends a clean alert with a before-and-after diff the moment something meaningful changes. It runs locally in the user's browser: watched pages, snapshots, and diffs stay on the user's device by default.

Operated by Birchwood Group LLC.

## Key facts

- Product type: Chrome browser extension (website change monitoring / page change detection)
- Pricing: Free plan (5 watches, checks every 6 hours or daily, all alert channels, no credit card). Pro: $9/month or $79/year (more watches, faster checks, advanced filters)
- Alert channels: desktop notifications, Telegram, Slack, Discord, ntfy phone push, custom webhooks — all available on the free plan
- Privacy: monitoring runs locally in the browser; no external server crawls pages on the user's behalf; pages behind a login are supported because checks reuse the user's own session
- Can track numeric values (prices, stock counts) over time with sparkline trends and threshold alerts (Pro)
- Can monitor JSON endpoints with structure-aware diffing

## Pages

- [Home](https://arcwatchtower.com/): product overview, how it works, features, benefits, pricing, FAQ
- [Privacy Policy](https://arcwatchtower.com/privacy-policy)
- [Terms of Service](https://arcwatchtower.com/terms)
- [Cookie Policy](https://arcwatchtower.com/cookie-policy)
- [Accessibility](https://arcwatchtower.com/accessibility)
- [Acceptable Use Policy](https://arcwatchtower.com/acceptable-use)