Software Alternatives, Accelerators & Startups

CMDK for Gmail VS RepDB

Compare CMDK for Gmail VS RepDB and see what are their differences

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CMDK for Gmail logo CMDK for Gmail

CMDK (previously known as Simplehuman) is a browser extension that brings advanced keyboard shortcuts and command bar to Gmail, and teaches how to use them as you use Gmail everyday โšก๏ธ

RepDB logo RepDB

Exercise dataset for fitness apps: transparent background, animations, no subscription
Visit Website
  • CMDK for Gmail Command bar in Gmail
    Command bar in Gmail //
    2024-11-13
  • CMDK for Gmail Nudges to learn keyboard shortcuts when you use our mouse
    Nudges to learn keyboard shortcuts when you use our mouse //
    2024-11-13
  • CMDK for Gmail Inbox zero
    Inbox zero //
    2024-11-13
  • CMDK for Gmail Search for keyboard shortcuts
    Search for keyboard shortcuts //
    2024-11-13

Use simpler keyboard shortcuts to navigate through email, archive, delete, switch between email in almost flow-state speeds. It brings the Superhuman shortcut experience right inside Gmail, without costing your $30/month.

Features: 1. Superhuman shortcuts right inside Gmail - Esc, Snooze, Command+K, RSVP, Open Links A simpler and affordable alternative to Superhuman. This extensions adds the same shortcuts and workflows that you love and have gotten used to. Extra handy for times you have to use Gmail or if you are looking to stop using Superhuman, but your shortcut muscle memory still wants to use the same shortcuts.

  1. Command Center for emails - Cmd+K or Ctrl+K All your email actions - mark read/unread, report spam, archive, add label, compose etc available in an easy to use command bar. You wouldn't need to use your mouse again (mostly). An alternative to Superhuman, if you will.

  2. Nudges to learn keyboard shortcuts Whenever you use your mouse, CMDK gently prompts you with the keyboard shortcut that you could have use instead. Migrate to using shortcuts at your own pace.

  3. Quick navigation through your email Jumping between your Inbox, Sent, Drafts, or Folders is now an easy to use command with CMDK. Hit Esc to go back to the previous screen from wherever you are. You don't need to pay $30/mo to give you shortcuts when Gmail already has them ;)

  4. Quick actions for Opening links, RSVP, Unsubscribe, and attachments RSVP to calendar invites, open attachments or links, or unsubscribe from those pesky emails using the Command Center.

  5. Browser extension that works everywhere Works on all popular browsers. You can continue using extensions like Grammarly, Streak, and Mixmax while being faster at email.

Email is heavy, hard, and plenty. But email does not have to be a pain or expensive. Mastery over your email is the quickest way to a healthier relationship with it, and CMDK will get you there.

  • RepDB
    Image date //
    2026-07-21
  • RepDB Landing page
    Landing page //
    2026-07-21
  • RepDB
    Image date //
    2026-07-21

RepDB is a one-time-purchase exercise dataset for developers building fitness and workout apps โ€” not a subscription, not a rate-limited API. You download the data once and own it: JSON (and SQLite on the higher tier), WebP images, and full EN/DE/ES translations, with no per-request billing and no dependency on our servers staying up.

A free tier includes 400 exercises with flat-style 512ร—512 images, attribution-licensed for commercial in-app use. The Starter tier ($199) adds the full catalog in classic white-background style. Standard ($399) adds transparent 1024px images, looping animations, exercise relations (similar/progressions/regressions), workout templates, and embeddings โ€” exclusive to that tier.

Every exercise includes muscle-group highlighting, equipment/muscle icons, MET values, and safety/goal tags. Compared to GIF- or JPG-based competitor APIs, RepDB images are transparent WebP with no watermarks, so they drop into any app UI without a white box around them.

CMDK for Gmail

Website
cmdk.email
$ Details
paid Free Trial $4.0 / Monthly
Platforms
Google Chrome Arc Browser Edge Chromium
Release Date
2023 March
Startup details
Country
United States
Founder(s)
Phalgun Guduthur
Employees
1 - 9

RepDB

Website
repdb.co
$ Details
freemium $199.0 / One-off
Platforms
Web Mobile
Release Date
2026 July

CMDK for Gmail features and specs

  • Advanced keyboard shortcuts
    Keyboard shortcuts to navigate in Gmail - go to Inbox, go to Spam, RSVP to events, unsubscribe from emails.
  • Command bar
    To search for shortcuts and act on your email
  • Inbox Zero
    Non boring screen when you hit inbox zero

RepDB features and specs

  • WebP Format Benefits
    start+peak exercise images
  • JSON
    relations, metadata, equipment
  • Transparency
    transparent background
  • Animations
    Animated loops in paid tier

Analysis of CMDK for Gmail

Overall verdict

  • CMDK for Gmail (cmdk.email) is a well-regarded productivity tool that brings keyboard-driven command palette functionality to Gmail, helping users navigate and manage their inbox faster without relying on the mouse.

Why this product is good

  • Provides a Spotlight/command-palette style interface for Gmail, letting you search, navigate, and act on emails quickly
  • Emphasizes keyboard shortcuts, which can significantly speed up common inbox tasks and reduce reliance on the mouse
  • Streamlines email workflows for power users who process high volumes of messages daily
  • Lightweight browser-based approach that integrates directly into the Gmail interface
  • Appeals to those who value efficiency and want to keep their hands on the keyboard

Recommended for

  • Power users and professionals who process large volumes of email daily
  • Keyboard-shortcut enthusiasts who prefer command-palette style navigation
  • Developers, founders, and knowledge workers seeking to speed up inbox management
  • Anyone using Gmail who wants a faster, more efficient email workflow

Category Popularity

0-100% (relative to CMDK for Gmail and RepDB)
Email Clients
100 100%
0% 0
Datasets
0 0%
100% 100
Email
100 100%
0% 0
Developer Tools
0 0%
100% 100

Questions & Answers

As answered by people managing CMDK for Gmail and RepDB.

What makes your product unique?

CMDK for Gmail's answer

The only app out there which adds superhuman type keyboard shortcuts to Gmail, without the hefty price of $30/month.

RepDB's answer:

RepDB is sold as a one-time download, not a metered API โ€” you own the JSON/SQLite data and WebP images outright, with no rate limits, no per-request billing, and no risk of the vendor cutting off access. It's also the only dataset in this space with EN/DE/ES translations, transparent (alpha-channel) images with no watermark, muscle-group highlighting, safety/goal tags, and looping animations on the higher tier.

What's the story behind your product?

CMDK for Gmail's answer

I was a user of Superhuman for over 2 years and got tired of paying $30/month. I wanted the best features of Superhuman right inside Gmail, and thats when I started working on this browser extension.

RepDB's answer:

RepDB grew out of a consumer workout app its creator was building solo. Sourcing exercise images and data meant either paying for a subscription API with usage caps and no caching rights, or producing everything from scratch. The illustrated, multi-language dataset was built for us first, then split out as its own product once it became clear other indie developers had the same problem and preferred to buy the data outright rather than rent it through an API.

Which are the primary technologies used for building your product?

CMDK for Gmail's answer

Javascript, LLMs.

Why should a person choose your product over its competitors?

CMDK for Gmail's answer

If you want to continue using Gmail but also want the Superhuman email experience.

RepDB's answer:

Most alternatives are subscription APIs โ€” you pay monthly, you're capped on requests, and ExerciseDB's terms of use explicitly forbid caching or storing the data at all, so every image render is a live paid API call. RepDB is the opposite: pay once, download the files, self-host with zero ongoing dependency. It's also the only option offering true DE/ES localization and transparent images instead of a white box behind every exercise.

Who are some of the biggest customers of your product?

CMDK for Gmail's answer

We have executives from Reddit, Netflix, Microsoft, Flipkart using Simplehuman.

How would you describe the primary audience of your product?

CMDK for Gmail's answer

Small business owners, founders, executive assistants, sales reps. Anyone who uses email a lot in their day.

RepDB's answer:

Solo developers and small teams building fitness or workout-tracking apps (iOS, Android, web) who need licensed exercise images and structured exercise data, but don't want to build their own media pipeline or depend on a rate-limited third-party API.

User comments

Share your experience with using CMDK for Gmail and RepDB. For example, how are they different and which one is better?
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Social recommendations and mentions

Based on our record, CMDK for Gmail seems to be more popular. It has been mentiond 1 time since March 2021. We are tracking product recommendations and mentions on various public social media platforms and blogs. They can help you identify which product is more popular and what people think of it.

CMDK for Gmail mentions (1)

RepDB mentions (0)

We have not tracked any mentions of RepDB yet. Tracking of RepDB recommendations started around Jul 2026.

What are some alternatives?

When comparing CMDK for Gmail and RepDB, you can also consider the following products

InboxZero - The best and most innovative mail app to master your overloaded mailbox.

Superhuman - Superhuman is an email management tool.

Shortwave - Email smarter & faster with a reinvented experience for your Gmail

Snailbox - Schedule your email at specific times and recover the time you're losing to your inbox.

Mailman HQ - Mailman is an email management software that shields you from unimportant emails. It minimizes interruptions and increases productivity for calmer days.

FiloMail - AI for Gmail that writes replies, summarizes long emails, and auto-creates to-dos. Try FiloMail free on iOS, Android, macOS, and Windows.