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Spectra by BrandCurb

Chrome extension by BrandCurb · Productivity · Communication

  • Established publisher
  • Trader

A Chrome extension in Productivity · Communication with 8 users, barely installed. Audience over the last 30 days: -1.

Specific sites only: 2 match patterns.

What the developer says, and 1 screenshot

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

Users
8
Rating
5.0 (2 ratings)
Users, last 30 days
-1
Rating, last 30 days
Steady over 30 days
Version
2.1.2
Updated in the store
2026-10-22
Published
2026-02-20
Manifest
V3
Browser access
3 permissions, 2 site patterns

How it has moved

Users
-1 since 02.10
7-9 · 12 readings
2026-10-22: released 2.1.2
  1. 2026-10-048
  2. 2026-10-087
  3. 2026-10-098
  4. 2026-10-107
  5. 2026-10-188
  6. 2026-10-197
  7. 2026-10-218
  8. 2026-10-227released 2.1.2
  9. 2026-10-248
  10. 2026-10-257
  11. 2026-10-308
  12. 2026-11-018
Rating
unchanged since 02.10
reviewsrating 5.00 · 12 readings
2026-10-22: released 2.1.2
  1. 2026-10-04reviews2rating5.00
  2. 2026-10-08reviews2rating5.00
  3. 2026-10-09reviews2rating5.00
  4. 2026-10-10reviews2rating5.00
  5. 2026-10-18reviews2rating5.00
  6. 2026-10-19reviews2rating5.00
  7. 2026-10-21reviews2rating5.00
  8. 2026-10-22reviews2rating5.00released 2.1.2
  9. 2026-10-24reviews2rating5.00
  10. 2026-10-25reviews2rating5.00
  11. 2026-10-30reviews2rating5.00
  12. 2026-11-01reviews2rating5.00
Users
+1 since 01.09
7-21 · 25 readings
2026-10-22: released 2.1.2
  1. 2026-09-017
  2. 2026-09-0211
  3. 2026-09-0316
  4. 2026-09-0617
  5. 2026-09-0921
  6. 2026-09-1018
  7. 2026-09-1314
  8. 2026-09-1515
  9. 2026-09-179
  10. 2026-09-2110
  11. 2026-09-229
  12. 2026-09-2610
  13. 2026-09-289
  14. 2026-10-048
  15. 2026-10-087
  16. 2026-10-098
  17. 2026-10-107
  18. 2026-10-188
  19. 2026-10-197
  20. 2026-10-218
  21. 2026-10-227released 2.1.2
  22. 2026-10-248
  23. 2026-10-257
  24. 2026-10-308
  25. 2026-11-018
Rating
unchanged since 01.09
reviewsrating 5.00 · 25 readings
2026-10-22: released 2.1.2
  1. 2026-09-01reviews1rating5.00
  2. 2026-09-02reviews2rating5.00
  3. 2026-09-03reviews2rating5.00
  4. 2026-09-06reviews2rating5.00
  5. 2026-09-09reviews2rating5.00
  6. 2026-09-10reviews2rating5.00
  7. 2026-09-13reviews2rating5.00
  8. 2026-09-15reviews2rating5.00
  9. 2026-09-17reviews2rating5.00
  10. 2026-09-21reviews2rating5.00
  11. 2026-09-22reviews2rating5.00
  12. 2026-09-26reviews2rating5.00
  13. 2026-09-28reviews2rating5.00
  14. 2026-10-04reviews2rating5.00
  15. 2026-10-08reviews2rating5.00
  16. 2026-10-09reviews2rating5.00
  17. 2026-10-10reviews2rating5.00
  18. 2026-10-18reviews2rating5.00
  19. 2026-10-19reviews2rating5.00
  20. 2026-10-21reviews2rating5.00
  21. 2026-10-22reviews2rating5.00released 2.1.2
  22. 2026-10-24reviews2rating5.00
  23. 2026-10-25reviews2rating5.00
  24. 2026-10-30reviews2rating5.00
  25. 2026-11-01reviews2rating5.00

A dot marks a day the store showed a different number. Between them the line carries the last one forward: we read every listing up to 2 times 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: 2 match patterns.

  • https://mail.google.com/*
  • https://spectra.brandcurb.com/*

The full permission history for this extension

Version history

  1. Version 2.1.2

What changed recently

  1. Package size changed
  2. Released version 2.1.2 (was 2.1.1)

The publisher

BrandCurb publishes 2 listings we track, 10 users between them. Listed website: brandcurb.com.

  1. Orbinix - Intelligent Resume Tailor BrandCurb · Productivity · Tools · published 2026-04-04 2 users (last published figure)

Like this one

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

  1. Seen - Privacy Focused Email Tracker Describes nearly the same job, smaller audience 42 users ★ 4.0
  2. Email Tracker for Gmail by Makeinfo Describes nearly the same job, smaller audience 36 users ★ 5.0
  3. SeeMail - Email Tracking & Analytics for Gmail Describes nearly the same job, smaller audience 2 users (last published figure)
  4. Fast Mail Tracker: Email Tracker & Read Receipts for Gmail Describes nearly the same job, smaller audience 19 users ★ 5.0
  5. Free Unlimited Email Tracker for Gmail, No Signature | TrackMailBox Describes nearly the same job, smaller audience 8k users ★ 4.6

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.

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Users and rating on Ext Ops Panel

Markdown

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HTML

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Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store last changed these figures on 2026-10-30. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built