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CMDK - Read Receipts, Split Inbox, Hotkeys & Reminders for Gmail

Chrome extension by simplehuman.email · Productivity · Tools

  • Featured
  • Established publisher

A Chrome extension in Productivity · Tools with 1 000 users, a small but real audience.

Specific sites only: 1 match pattern.

What the developer says, and 5 screenshots

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

Users
1 000
Rating
4.9 (63 ratings)
Users, last 15 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
70.0.4
Updated in the store
2026-09-15
Published
2021-07-08
Manifest
V3
Browser access
6 permissions, 1 site pattern

How it has moved

Users
unchanged since 01.09
1k · 4 readings
2026-09-04: released 70.0.02026-09-08: released 70.0.12026-09-09: released 70.0.32026-09-15: released 70.0.4
  1. 2026-09-011k
  2. 2026-09-061k
  3. 2026-09-101k
  4. 2026-09-151kreleased 70.0.4
Rating
unchanged since 01.09
reviewsrating 4.90-4.91 · 4 readings
2026-09-04: released 70.0.02026-09-08: released 70.0.12026-09-09: released 70.0.32026-09-15: released 70.0.4
  1. 2026-09-01reviews61rating4.90
  2. 2026-09-06reviews62rating4.90
  3. 2026-09-10reviews63rating4.91
  4. 2026-09-15reviews63rating4.91released 70.0.4
Users
unchanged since 01.09
1k · 4 readings
2026-09-04: released 70.0.02026-09-08: released 70.0.12026-09-09: released 70.0.32026-09-15: released 70.0.4
  1. 2026-09-011k
  2. 2026-09-061k
  3. 2026-09-101k
  4. 2026-09-151kreleased 70.0.4
Rating
unchanged since 01.09
reviewsrating 4.90-4.91 · 4 readings
2026-09-04: released 70.0.02026-09-08: released 70.0.12026-09-09: released 70.0.32026-09-15: released 70.0.4
  1. 2026-09-01reviews61rating4.90
  2. 2026-09-06reviews62rating4.90
  3. 2026-09-10reviews63rating4.91
  4. 2026-09-15reviews63rating4.91released 70.0.4

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.

  • *://mail.google.com/*
  • Block or redirect requests on the sites it can access declarativeNetRequestWithHostAccess
  • Sign you in with a Google account identity
  • Keep running while the browser is open background
Show the remaining 3
  • Add items to the right-click menu contextMenus
  • Receive push messages from its developer gcm
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 70.0.4
  2. Version 70.0.3
  3. Version 70.0.1
Show the remaining 1
  1. Version 70.0.0

What changed recently

  1. Package size changed
  2. Released version 70.0.4 (was 70.0.3)
  3. Package size changed
Show the remaining 4
  1. Released version 70.0.3 (was 70.0.1)
  2. Released version 70.0.1 (was 70.0.0)
  3. Package size changed
  4. Released version 70.0.0 (was 62.3.1)

The publisher

simplehuman.email. Listed website: cmdk.email.

Like this one

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

  1. MailKit - Power Toolkit for Gmail Describes nearly the same job, smaller audience 1 user
  2. ReplyHounds for Gmail Describes nearly the same job, smaller audience 3 users
  3. RightInbox: Email Reminders, Tracking, Notes Describes nearly the same job, with a large installed audience 100k users ★ 4.6
  4. Smart Templates for Gmail Describes nearly the same job, smaller audience 7 users
  5. Mail Cleaner Pro Describes nearly the same job, smaller audience 16 users ★ 5.0

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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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.