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Koalendar: Free Appointment Scheduling

Chrome extension by koalendar · Productivity · Tools

  • Featured
  • Established publisher

A Chrome extension in Productivity · Tools with 10 000 users, an established extension.

No site access is declared in the manifest, so it cannot read the pages you open on its own.

What the developer says, and 4 screenshots

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

Users
10 000
Rating
4.9 (309 ratings)
Users, last 17 days
unchanged
Rating, last 30 days
Not watched long enough to say
Version
2.2.1
Updated in the store
2026-09-06
Published
2020-08-27
Manifest
V3
Browser access
No permissions declared

How it has moved

Users
unchanged since 01.09
10k · 2 readings
  1. 2026-09-0110k
  2. 2026-09-1710k
Rating
unchanged since 01.09
reviewsrating 4.94 · 2 readings
  1. 2026-09-01reviews309rating4.94
  2. 2026-09-17reviews309rating4.94
Users
unchanged since 01.09
10k · 2 readings
  1. 2026-09-0110k
  2. 2026-09-1710k
Rating
unchanged since 01.09
reviewsrating 4.94 · 2 readings
  1. 2026-09-01reviews309rating4.94
  2. 2026-09-17reviews309rating4.94

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

No site access is declared in the manifest, so it cannot read the pages you open on its own.

We have not read this listing's manifest since we started keeping permission names. The counts above come from the last time we did.

The full permission history for this extension

What changed recently

Nothing has moved on this listing since we started watching it.

The publisher

koalendar. Listed website: koalendar.com.

Like this one

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

  1. Appointment Booking & Scheduling by vCita Describes nearly the same job, smaller audience 4k users ★ 4.1
  2. Calfrenzy - Free Meeting Scheduler & Booking Pages Describes nearly the same job, smaller audience 94 users ★ 5.0
  3. Acuity Scheduling Describes nearly the same job, smaller audience 535 users ★ 4.8
  4. Slotify: Easy Scheduling Describes nearly the same job, smaller audience 4 users (last published figure)
  5. Paage Calendar Describes nearly the same job, smaller audience 6 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.