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

By simplehuman.email

Auto BCC and CC for Gmail, plus read receipts, split inbox, 25+ hotkeys, snippets, and reminders.

View Chrome Web Store

Time on the storeAbout 3 years or moreA rough range, not an exact date

Store users≈1KRounded by the Chrome Web Store

Chrome Web Store rating4.9 / 564 ratings on the Chrome Web Store

Last store update6 Oct 2026Version 70.7.2, 2 days ago

Inside the extension

CMDK - Read Receipts, Split Inbox, Hotkeys & Reminders for Gmail developer product preview 1

Product image 1 of 5

Reviews

Dennis Brown2 days ago
Great alternative to Superhuman: same (if not better) shortcut functionality; open tracking (without the need for a higher tier or paying more money in any way 🙂); customisable/filterable tabs; efficient & handy tools for bulk clearance of unwanted emails; the list goes on. And the support is excellent, with almost instant responses and great uptake of feature suggestions. If you're coming from Superhuman, you may miss their extra-super-sleek UI a little, but the overall UX is as close a match as you're likely to find, and at a fraction of the cost. Overall, great product; thoroughly recommended.
Zahra Khan8 days ago
i love this product <3
Karl Wiley31 days ago
Has been great since it was Simplehuman... Even better and continuing to improve under CMDK!
P.N. Nageshwaran34 days ago
The next best option to a stand alone Gmail App. Well done. Phalgun
Ben Huynh2 months ago
has truly helped me zoom through my emails, and help organize my life!
Brad O'Neill2 months ago
One of my greatest finds on the Chrome Web Store. This product enabled me to cancel a well‑known AI email program and software and move to this, which does everything and more. Top work Phalgun!
Morgan Love3 months ago
great email app for speeding up your email processing. Sometimes runs a littttle slow on my pc, but I understand the developer is working on new features quite a lot, so hopefully optimisation is improved once teh feature roadmap is complete.
Wiebke Zollmann3 months ago
Couldn't be happier. The shortcuts, snippets, and tracking work brilliantly, and the developer is super responsive to any questions I've had during the onboarding. Highly recommended. CMDK is a rock-solid alternative to Superhuman at a fraction of the cost.
Dominic Roser4 months ago
Really good and helpful. And the developer was even very responsive to feedback!
Chris Hallowes4 months ago
I have started using CMDK as a layer over my gmail. Once i got used to it i love it, it makes managing my gmail so much easier. I had an issue with my gmails, but a few emails to CMDK who provide real-time support resolved it in a very short time on a weekend - most impressive!!! Chris.
Fernando Fontoura5 months ago
Very useful, continuous development, incredible customer support, highly recomend it!
Dilip Goswami6 months ago
Great - simple as it says, but adds a bunch of convenient time saving features. I don't need a full on client, I just need my Gmail to be fast, and this does it.
Andrew M7 months ago
Excellent product and customer service - he is always available and helpful to guide you through any questions. There are a LOT of one-touch shortcuts to learn, but repeated use makes it easier, and the Ctrl-K master menu allows you to access any shortcut instantly with a search. Highly recommended - no need for a complex, AI-driven solution if you are using Gmail every day.
Bence Zwecker7 months ago
Great product does all the stuff that you need from it. Super helpful support. Would totally recommend for anyone looking for a decently priced alternative for more expensive solutions out there without all the fluff.
Zachary Eisenstat7 months ago
Solid extension that provides many of the key benefits of MUCH pricer tools. Even better that this lives in Gmail, so you can use other extensions as well. Unfortunately there is no way to port things onto mobile, but has just made me focus more on what and how I need to be updated on emails. The only thing better than than the extension is the developer who is amazingly responsive and excited to continue to develop and and upgrade for the benefit of all users.

Reviews

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Permissions & access

Access levelMedium

Can ask for your Google account sign-in, plus 1 more sensitive permission.

What it’s allowed to do, not what it actually does. Not a safety rating.

Permissions 6

Sensitive2

Ask for your Google account sign-inidentity
Change web traffic on the sites it can accessdeclarativeNetRequestWithHostAccess

Standard4

Save its own settingsstorage
Keep running in the backgroundbackground
Receive push messagesgcm
Add items to the right-click menucontextMenus

Members also see when a new version asks for new access.

Website access 1

mail.google.com

Extension ID: nipfocapamlefjhldhcagammlldbangf
Package size: 1.52MiB
Manifest: Version 3

The maker

This is the only listing we know of from simplehuman.email.

Listings: 1
Combined store users: ≈1K
Store Featured: 1

Combined users can count the same person more than once. Maker profile

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Inside the extension

Reviews

Reviews

Competitors

Permissions & access

Permissions 6

Sensitive2

Standard4

Website access 1

The maker

Should you build in this niche?

Reviews