Koalendar – Easy Appointment Scheduling & Booking Plugin

How well this listing is tuned to rank in WordPress.org search, on the factors an owner controls. Not popularity, optimization.

Directory rank vs rivals

wp.org popularity rank over time · higher is better · when a rival's line climbs above yours, they've overtaken you

How often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.

Share of active installs on each version of this plugin · 100% run the current release. Green is the current release; a big slice on older versions is a user base that has stopped updating.

Modeled within the band wp.org reports; tightens as we track daily.

At the current install trend, crossing 2K+ in roughly 1033 days.

No paid tier is visible, so we don't put a figure on revenue or sale value: that would be guessing. The install base is a real asset to an acquirer, just not one public data lets us price. A small install base leaves thin data to model from.

1. ★★★★★ Altairzen Consulting

   2.6y ago

   We appreciate and enjoy this plugin. It’s simple, effective, and user-friendly. Excellent job to the team and keep up the great work!

   Read on wp.org ↗
2. ★★★★★ cpavaan

   2.8y ago

   muy bueno

   Read on wp.org ↗
3. ★★★★★ jordiallue

   2.9y ago

   Prático e poderoso!

   Read on wp.org ↗
4. ★★★★★ tariqahmad007

   3.9y ago

   Awesome plugin for schedule calling

   Read on wp.org ↗
5. ★★★★★ pratikshan

   4.1y ago

   This plugin really helped me in creating the design i wanted to creat

   Read on wp.org ↗
6. ★★★★★ nerdlord

   4.3y ago

   I love koalendar! I love that even on the free version you get way more features than the competitor and even when you upgrade the cost is inexpensive.

   Read on wp.org ↗
7. ★★★★★ antonin7920

   4.5y ago

   Magnifique !

   Read on wp.org ↗
8. ★★★★★ sreum

   4.6y ago

   Simple operation and top results!

   Read on wp.org ↗

1 disclosed vulnerability on record for this plugin, fixed in the current version. Sites on older versions stay exposed until they update.

1. Medium · 6.4 Koalendar – Events & Appointments Booking Calendar <= 1.0.2 - Authenticated (Contributor+) Stored Cross-Site Scripting via height Parameter ↗
   2024-12-13 CVE-2024-11855 Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting') Affects <= 1.0.2 Patched in 1.0.3

Automated install-time checks, tested on PHP 8.1.12 · WP 7.0.1

Growth timeline

Install-tier crossings we have observed, and how long each tier took to outgrow

1. 2026-08-20 900+ → 1K+ up after 27 days in tier
2. 2026-07-24 1K+ → 900+ down after 1 days in tier
3. 2026-07-23 900+ → 1K+ up after 3 days in tier
4. 2026-07-20 1K+ → 900+ down after 10 days in tier
5. 2026-07-10 1K+ → 900+ down after 14 days in tier
6. 2026-06-26 900+ → 1K+ up after 6 days in tier
7. 2026-06-20 1K+ → 900+ down after 1 days in tier
8. 2026-06-19 900+ → 1K+ up after 1 days in tier

Competes with

The plugins that solve the same job, ranked by shared tags then reach, closest match first. The letter on the right is each plugin's health grade (A best, F worst).

• SimplyBook.me – Booking and reservations calendar 30K+ installs · 4.3★ · 3 shared tags A
• Hydra Booking — Appointment Scheduling & Booking Calendar 2K+ installs · 4.1★ · 3 shared tags A
• O Online Booking & Scheduling Calendar for WordPress by vcita 1K+ installs · 3.9★ · 3 shared tags B
• Sign In Scheduling Online Appointment Booking System 700+ installs · 4.1★ · 3 shared tags D
• Oryx Bookings: WooCommerce Appointments & Scheduling (100% Free) 100+ installs · 3.6★ · 3 shared tags B
• DaySchedule 90+ installs · 3.6★ · 3 shared tags C

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Koalendar – Easy Appointment Scheduling & Booking Plugin: 1K+ active installs, 5.0★ (9 reviews). Plugin Pulse (WP Mayor), as of 2026-08-29. https://plugins.wpmayor.com/plugin/koalendar-free-booking-widget