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CLUSTER CHANGES-WEB-ALERTS · 20 ENTRIES · EARLIEST ENTRY 2019-02-05

Web page change monitoring apps

This cluster comprises web and mobile applications that track web pages for content updates and notify users via email or in-app alerts, with some offering keyword or price-drop triggers. Dated entries appear sporadically between February 2008 and May 2023, with most months seeing a single product and May 2023 having two, indicating a thin but persistent trickle of new tools. Traction leaders by activity signal are changedetection.io, page-patrol, and NOVA-Wawa, each holding zero stars.

Entry timeline

ENTRY TIMELINE

FEB 2008: 1FEB 2019: 1DEC 2021: 1MAY 2023: 2AUG 2026: 6SEP 2026: 8OCT 2026: 1
FEB 2008OCT 2026

Each bar is the month a member carries, which is a creation date where the source published one and a crawl date otherwise. Nothing in the index was found before 11 August 2026, and coverage broadened sharply on 14–15 August, so a bar from then on reports how much we found that month, not how much was built; an earlier bar reports how far back a member's own source dated it — not how long we have been watching.

Members by activity

Activity signals, not revenue.

Build origin · 6 ai-built · 2 hand-coded · 12 unlabelled

Operator · 4 hobby · 2 indie · 5 open source · 9 unlabelled

Two labels per entry, never collapsed into one: how it was built, and who stands behind it. Counted over the 20 listed below. Unlabelled means nothing has decided yet — not that the answer is small.

  1. 01changedetection.io0★29 daysliveopen sourceWeb-based tool that tracks web page changes and alerts users when content is updated.
  2. 02page-patrol0★8 days—Web app that monitors web pages for changes and alerts users when content updates.
  3. 03NOVA-Wawa0★12 daysliveWeb app with user accounts that emits real-time updates in the browser when new users register.
  4. 04alertwes-ops0★15 daysliveai-builthobbyWeb app that displays alerts from an existing alert service, recreating its website for users.
  5. 05PagePulse0★24 dayslivehobbyOn-device Android app that monitors web pages and sends alerts when the text or visual appearance of a page changes.
  6. 06scanwatch-cli0★26 daysliveai-builtindieWebsite monitoring tool that checks pages and endpoints for changes and sends Telegram alerts when updates occur.
  7. 07data-monitor0★21 days—indieData monitoring and alerting app that periodically collects configured public data sources, detects changes, and sends notifications to messaging platforms.
  8. 08updatehero0★1 moliveai-builtWeb app that monitors software releases and alerts users about new updates.
  9. 09pageping1★1 mo—hobbyWeb app that monitors web pages and emails users when content changes, with keyword alerts, price-drop alerts, and public diff pages.
  10. 10Trend-Engine0★1 mo—Web app for editorial teams that monitors configured sources, detects emerging trends, scores momentum, and sends email alerts.
  11. 11drift-url-sentry-echo0★1 mo—Web app that provides URL monitoring and change alerts for a designated user profile.
  12. 12opal-url-sentry-echo0★1 mo—Web app that provides URL monitoring and change alerts for a designated user profile.
  13. 13Kin0★1 molivehobbyWeb app that monitors websites for changes and surfaces updates on an interactive dashboard.
  14. 14openwebmonitor30★1 yrabandonedliveopen sourceWeb content monitoring tool that tracks changes on specified websites and notifies users of updates.
  15. 15newitemmonitor0★1 yrabandonedliveopen sourceUniversal new product monitor that alerts users whenever new items are released on tracked websites or stores.
  16. 16ck4up0★11 yrabandonedlivehand-codedopen sourceCommand-line utility that monitors web pages for changes and reports updates to users.
  17. 17Change Detection0★6 yrabandonedlivehand-codedopen sourceAndroid app that monitors website changes and notifies users when selected pages update.
  18. 18Daily Site Checker0★unknownliveai-builtWeb-based tool that automatically checks a target website each day and highlights content or structural changes.
  19. 19Notificações0★unknownliveai-builtWeb app for viewing and managing notifications, keeping users informed about updates and alerts.
  20. 20Auto Refresh & Page Monitor0★unknownliveai-builtWeb tool that automatically refreshes pages and monitors them for updates or changes.

Ranked by traction, highest first, and paged 20 at a time — this is a window on the cluster, never the whole of it. Ties are broken by a stable id so a product cannot appear on two pages or fall between them. Browse every cluster.