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Free Email Tracker for Gmail — Read Receipts & Open Tracking | Kilroy

Chrome extension by app.relaylabs · Productivity · Workflow

A Chrome extension in Productivity · Workflow with 18 users, barely installed. Audience over the last 30 days: +7.

Specific sites only: 4 match patterns.

What the developer says, and 5 screenshots

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

Users
18
Rating
5.0 (2 ratings)
Users, last 30 days
+7
Rating, last 30 days
Steady over 30 days
Version
1.0.6
Updated in the store
2026-10-29
Published
2026-09-11
Manifest
V3
Browser access
3 permissions, 4 site patterns

How it has moved

Users
+7 since 02.10
10-18 · 16 readings
2026-10-17: released 1.0.6
  1. 2026-10-0412
  2. 2026-10-0811
  3. 2026-10-0910
  4. 2026-10-1013
  5. 2026-10-1314
  6. 2026-10-1616
  7. 2026-10-1715released 1.0.6
  8. 2026-10-1816
  9. 2026-10-1917
  10. 2026-10-2016
  11. 2026-10-2218
  12. 2026-10-2317
  13. 2026-10-2517
  14. 2026-10-2818
  15. 2026-10-3017
  16. 2026-11-0118
Rating
unchanged since 02.10
reviewsrating 5.00 · 16 readings
2026-10-17: released 1.0.6
  1. 2026-10-04reviews2rating5.00
  2. 2026-10-08reviews2rating5.00
  3. 2026-10-09reviews2rating5.00
  4. 2026-10-10reviews2rating5.00
  5. 2026-10-13reviews2rating5.00
  6. 2026-10-16reviews2rating5.00
  7. 2026-10-17reviews2rating5.00released 1.0.6
  8. 2026-10-18reviews2rating5.00
  9. 2026-10-19reviews2rating5.00
  10. 2026-10-20reviews2rating5.00
  11. 2026-10-22reviews2rating5.00
  12. 2026-10-23reviews2rating5.00
  13. 2026-10-25reviews2rating5.00
  14. 2026-10-28reviews2rating5.00
  15. 2026-10-30reviews2rating5.00
  16. 2026-11-01reviews2rating5.00
Users
+18 since 12.09
0-18 · 22 readings
2026-09-12: appeared in the store2026-09-14: released 1.0.32026-09-23: released 1.0.42026-09-24: released 1.0.52026-10-17: released 1.0.6
  1. 2026-09-120appeared in the store
  2. 2026-09-131
  3. 2026-09-205
  4. 2026-09-216
  5. 2026-09-2510
  6. 2026-09-2611
  7. 2026-10-0412
  8. 2026-10-0811
  9. 2026-10-0910
  10. 2026-10-1013
  11. 2026-10-1314
  12. 2026-10-1616
  13. 2026-10-1715released 1.0.6
  14. 2026-10-1816
  15. 2026-10-1917
  16. 2026-10-2016
  17. 2026-10-2218
  18. 2026-10-2317
  19. 2026-10-2517
  20. 2026-10-2818
  21. 2026-10-3017
  22. 2026-11-0118
Rating
+5.00 since 12.09
reviewsrating 0.00-5.00 · 22 readings
2026-09-12: appeared in the store2026-09-14: released 1.0.32026-09-23: released 1.0.42026-09-24: released 1.0.52026-10-17: released 1.0.6
  1. 2026-09-12reviews0rating0.00appeared in the store
  2. 2026-09-13reviews0rating0.00
  3. 2026-09-20reviews0rating0.00
  4. 2026-09-21reviews0rating0.00
  5. 2026-09-25reviews0rating0.00
  6. 2026-09-26reviews2rating5.00
  7. 2026-10-04reviews2rating5.00
  8. 2026-10-08reviews2rating5.00
  9. 2026-10-09reviews2rating5.00
  10. 2026-10-10reviews2rating5.00
  11. 2026-10-13reviews2rating5.00
  12. 2026-10-16reviews2rating5.00
  13. 2026-10-17reviews2rating5.00released 1.0.6
  14. 2026-10-18reviews2rating5.00
  15. 2026-10-19reviews2rating5.00
  16. 2026-10-20reviews2rating5.00
  17. 2026-10-22reviews2rating5.00
  18. 2026-10-23reviews2rating5.00
  19. 2026-10-25reviews2rating5.00
  20. 2026-10-28reviews2rating5.00
  21. 2026-10-30reviews2rating5.00
  22. 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: 4 match patterns.

  • https://mail.google.com/*
  • https://*.supabase.co/*
  • https://api.supabase.com/*
Show the remaining 1
  • https://ipwho.is/*
  • Sign you in with a Google account identity
  • Run its own code on the pages it can access scripting
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 1.0.6 · Asked for more permissions (7, was 6) (changed: browser permissions)
  2. Version 1.0.5
  3. Version 1.0.4
Show the remaining 1
  1. Version 1.0.3

What changed recently

  1. Package size changed
  2. Asked for more permissions (7, was 6) (changed: browser permissions)
  3. Released version 1.0.6 (was 1.0.5)
Show the remaining 9
  1. Store description rewritten
  2. Package size changed
  3. Released version 1.0.5 (was 1.0.4)
  4. Package size changed
  5. Released version 1.0.4 (was 1.0.3)
  6. Package size changed
  7. Store description rewritten (84 → 100 characters)
  8. Renamed from "Kilroy" to "Free Email Tracker for Gmail — Read Receipts & Open Tracking | Kilroy"
  9. Released version 1.0.3 (was 1.0.1)

Older entries and the full day by day series are in the app.

The publisher

app.relaylabs.

Like this one

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

  1. OpenTrace — Email Tracker for Gmail Describes nearly the same job, smaller audience 8 users ★ 5.0
  2. Email Tracker for Gmail by Makeinfo Describes nearly the same job, smaller audience 36 users ★ 5.0
  3. Driploop Email Tracker for Gmail Describes nearly the same job, smaller audience 5 users ★ 5.0
  4. Email Tracker For Gmail - MailerPlex Describes nearly the same job, smaller audience 3k users ★ 4.2
  5. Mail Tracker - Email Tracking for Gmail Describes nearly the same job, smaller audience 69 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.

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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 2026-11-01. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built