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OnceHub for Gmail

Chrome extension by OnceHub · Productivity · Workflow

  • Established publisher
  • Trader

A Chrome extension in Productivity · Workflow with 5 000 users, a small but real audience. Audience over the last 30 days: unchanged.

Every site you visit. This extension can read and change the content of any page you open.

What the developer says, and 3 screenshots

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

Users
5 000
Rating
4.8 (63 ratings)
Users, last 30 days
Unchanged (the store rounds this count to 1 000, so it moves only between steps)
Rating, last 30 days
Steady over 30 days
Version
38.1
Updated in the store
2026-10-26
Published
2014-08-16
Manifest
V3
Browser access
6 permissions, 2 site patterns

How it has moved

Users
unchanged since 29.09
5k · 1 reading
2026-10-14: released 37.62026-10-26: released 38.1
  1. 2026-10-295k
Rating
unchanged since 29.09
reviewsrating 4.84 · 1 reading
2026-10-14: released 37.62026-10-26: released 38.1
  1. 2026-10-29reviews63rating4.84
Users
unchanged since 31.08
5k · 2 readings
2026-09-07: released 37.42026-09-24: released 37.52026-10-14: released 37.62026-10-26: released 38.1
  1. 2026-08-315k
  2. 2026-10-295k
Rating
unchanged since 31.08
reviewsrating 4.84 · 2 readings
2026-09-07: released 37.42026-09-24: released 37.52026-10-14: released 37.62026-10-26: released 38.1
  1. 2026-08-31reviews63rating4.84
  2. 2026-10-29reviews63rating4.84

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

Every site you visit. This extension can read and change the content of any page you open.

  • Read and change cookies on the sites it can access cookies
  • See, enable and disable your other extensions management
  • See the address and title of every tab you have open tabs
Show the remaining 3
  • Run its own code on the pages it can access scripting
  • Act on the current tab, but only after you click it activeTab
  • Store data in your browser storage

The full permission history for this extension

Version history

  1. Version 38.1
  2. Version 37.6
  3. Version 37.5
Show the remaining 1
  1. Version 37.4

What changed recently

  1. Package size changed
  2. Released version 38.1 (was 37.6)
  3. Package size changed
Show the remaining 3
  1. Released version 37.6 (was 37.5)
  2. Released version 37.5 (was 37.4)
  3. Released version 37.4 (was 37.2)

The publisher

OnceHub publishes 2 listings we track, 10k users between them. Listed website: oncehub.com.

  1. ScheduleOnce OnceHub · published 2010-09-12 5k users ★ 3.5

Like this one

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

  1. Appozy — Booking Links Describes nearly the same job, smaller audience 3 users (last published figure)
  2. Calendbook.com extension Describes nearly the same job, smaller audience 13 users
  3. Meet.bot - Easy Scheduling for Everyone Describes nearly the same job, smaller audience 3 users ★ 5.0
  4. Open Calendar Slots Describes nearly the same job, smaller audience 5 users
  5. LeanData BookIt Describes nearly the same job, smaller audience 2k 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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The badge shows the audience and rating from our last pass over the store and links back to this page.

Users and rating on Ext Ops Panel

Markdown

[![Users and rating on Ext Ops Panel](https://extops.dev/extensions/ijlpmpplkkhpkhgpingckadmlohkgddg/badge.svg)](https://extops.dev/extensions/ijlpmpplkkhpkhgpingckadmlohkgddg)

HTML

<a href="https://extops.dev/extensions/ijlpmpplkkhpkhgpingckadmlohkgddg"><img src="https://extops.dev/extensions/ijlpmpplkkhpkhgpingckadmlohkgddg/badge.svg" alt="Users and rating on Ext Ops Panel" height="20"></a>

Figures come from our own regular passes over the public Chrome Web Store listing, last read on . The store has not changed these figures since 2026-08-31, when we first saw this listing. We publish no contact details for extension developers.

Where the data comes from: how the catalog is built