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Classcastle

Chrome extension by James Theakston · Productivity · Education

  • Established publisher

A Chrome extension in Productivity · Education with 3 users, barely installed.

Specific sites only: 1 match pattern.

What the developer says, and 2 screenshots

Loading from the Chrome Web Store. Open the listing if it does not appear.

Users
3
Rating
not rated yet
Users, last 9 days
+3
Version
1.1.0
Updated in the store
2026-10-02
Published
2026-09-28
Manifest
V3
Browser access
3 permissions, 1 site pattern

How it has moved

Users
+3 since 29.09
0-3 · 3 readings
2026-09-29: appeared in the store2026-10-02: gained the good publisher record badge2026-10-03: released 1.1.0
  1. 2026-09-290appeared in the store
  2. 2026-10-043
  3. 2026-10-073
Users
+3 since 29.09
0-3 · 3 readings
2026-09-29: appeared in the store2026-10-02: gained the good publisher record badge2026-10-03: released 1.1.0
  1. 2026-09-290appeared in the store
  2. 2026-10-043
  3. 2026-10-073

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing more than once a day and record a point only when something moves. History beyond ninety days is in the app.

What it can reach

Specific sites only: 1 match pattern.

  • https://hduyofdbpspjcuwvackd.supabase.co/*
  • See the address and title of every tab you have open tabs
  • Schedule work to run later alarms
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.1.0

What changed recently

  1. Package size changed
  2. Released version 1.1.0 (was 1.0.0)
  3. Store badges changed
Show the remaining 1
  1. Appeared in the store

The publisher

James Theakston publishes 9 listings we track, 249 users between them. Listed website: classcastle.org.

  1. Roblox Quick Start Link Generator James Theakston · Productivity · Tools · published 2025-11-19 73 users
  2. Search with DuckDuckGo James Theakston · Productivity · Tools · published 2025-09-24 61 users
  3. HighlightCursor James Theakston · Make Chrome Yours · Accessibility · published 2025-06-17 43 users
Show 5 more from this publisher
  1. Oxford Dictionary James Theakston · Productivity · Education · published 2025-11-29 27 users
  2. Import to JSON Data Generator James Theakston · Productivity · Developer · published 2025-09-29 25 users
  3. Midnight Mode James Theakston · Colors · published 2025-06-14 7 users
  4. Visual Finder James Theakston · Productivity · Tools · published 2025-06-29 5 users
  5. GitHub Themer James Theakston · Make Chrome Yours · Functionality · published 2025-11-12 5 users

Like this one

Listings the catalog judges closest in what they say they do.

  1. ClasroomGo - AI Borderless (Teacher) Describes nearly the same job, with an established audience 20k users ★ 3.7
  2. CME Describes nearly the same job, smaller audience 8 users ★ 5.0
  3. ClassPilot Describes nearly the same job, smaller audience 11 users
  4. Classroom View Pro Describes nearly the same job, smaller audience 465 users ★ 2.7
  5. ClassHive Kids Describes nearly the same job, smaller audience 499 users

The top 5 only. The full comparison, with why each one is close, is on the alternatives page; ranking a whole neighbourhood by your own criteria is in the app.

Is this your extension?

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Figures come from our own daily pass over the public Chrome Web Store listing, last read on . We publish no contact details for extension developers.