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ICS Calendar

by Room 34 Creative Services, LLC · Booking & Events

Also makes 9 other plugins · 13.4K+ installs across the portfolio →

Add the calendar you already use to any WordPress site! Google Calendar, Microsoft 365, iCloud and more… no API keys or complicated setup required.

Try it live opens a temporary test site in your browser, which can take about 20 seconds to load. Plugins that rely on outside services or a full server may not work completely there.

Health

A 91/100

no flags

Active installs

10K+

≈19K estimated

Momentum

+2%

downloads vs prior 30d

Biggest opportunity: Swap “events”, “google” and “microsoft” for “airbnb”, “google calendar” and “add to calendar”. “events” isn't earning its slot: you're not in the first 24 results for its own search. “airbnb” sits at #4 untagged, close enough for a declared tag to move it up. “google” isn't earning its slot: you're not in the first 24 results for its own search. “google calendar” sits at #6 untagged, close enough for a declared tag to move it up. “microsoft” isn't earning its slot: it only gets you to #16. “add to calendar” sits at #7 untagged, close enough for a declared tag to move it up. All five slots are taken, so one has to go.

How scoring works →
91 Health · A
Maintenance 100/100
Rating quality 96/100
Support 70/100
Security 92/100

91 health vs 69 average across 1,838 Booking & Events plugins

Install conversion

How it's measured →

0.5%

of downloads still active

At least 10K of 2M lifetime downloads are still running, below its category: the median Booking & Events plugin keeps 0.8%, across 940 plugins.

Downloads count every update, not just first installs, so older and more frequently released plugins read lower. Compare against other Booking & Events plugins, not across the directory. wp.org reports active installs as the bottom of a band, so the real rate is this or higher.

This plugin shipped 51 releases in the last 12 months, and every existing install that updated counted as another download. wp.org publishes no split between first installs and updates, so we show the raw rate rather than guess at one.

Details

Version
12.3.0
Last updated
2d ago
Added
2017-05-31 · 9 yrs old
Requires WP
5.3
Tested up to
7.1.4
Requires PHP
8.1

Directory ranking optimization

How it's scored →

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

98 / 100

Excellent listing optimization

Well tuned across the board

Update recency 100/100

Updated 2 days ago

WP compatibility 100/100

Tested up to WordPress 7.1.4, the current branch or newer

Rating quality 91/100

4.9★ over 72 reviews, smoothed to 4.57★

Listing tuning 100/100

5 of 5 tags set · short description in place

Support resolution 100/100

1 of 1 support threads resolved in the last 2 months

Daily downloads

Since 5 Oct 2022 · 1,488 days · wp.org + Plugin Pulse archive

+2% vs prior 30d
85031 Oct 2026

30-day downloads

Rolling 30-day volume · peak 75.6K · peaks are release surges

49.2K31 Oct 2026

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

ICS Calendar · #1454youWP Google Analytics · #3174The Events Calendar · #11854Site Kit by Google · #7

Rating trend

Star average over time · dips mark rough releases

4.931 Oct 2026

Health trend

Composite health score, snapshotted daily

9131 Oct 2026

Update activity

How busy the existing users are, measured as downloads in the last 30 days for every 1,000 active sites. A spike means a new release everyone's pulling; a long, slow decline means an aging user base that updates less.

4.9K31 Oct 2026

Release cadence

Actively maintained
from wp.org release tags

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

51

releases in the last 12 months

3d ago

latest release · v12.3.0 · 28 Oct 2026

579

tagged releases on record

Recent releases

12.3.0 · 28 Oct 202612.2.1 · 23 Oct 202612.2.0 · 18 Oct 202612.1.4.2 · 6 Oct 202612.1.4.1 · 21 Sep 202612.1.4 · 17 Sep 202612.1.3.1 · 3 Sep 202612.1.3.2 · 3 Sep 202612.1.3 · 28 Jul 202612.1.2 · 14 Jul 202612.1.1.1 · 1 Jul 202612.1.1 · 26 Jun 202612.1.0.1 · 21 Jun 202612.1.0 · 21 Jun 2026

What its installed base runs

via wordpress.org

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

v12.1 58%
v12.0 21%
v11.5 7.7%
Older / other versions 14%

Estimated active installs

The public count shows “10K+”. Our estimate pins where the real number sits.

tracked estimate
10K–20K ≈19K

Crossed into this band 4.1 years ago; a band this size takes about a year or more to cross, which places it about 90% of the way through.

Install history since 14 Nov 2019

10K31 Oct 2026

Recent reviews

All reviews on wp.org ↗
  1. ★★★★★ frankdoherty
    7mo ago

    Finally I found this product. The app is simple to setup and the support is next-level! You don’t need to look any further.

    Read on wp.org ↗
  2. ★★★★★ Rico
    8mo ago

    Easy google calendar customization.And support was also VERY helpful!

    Read on wp.org ↗
  3. ★★★★★ lwith
    9mo ago

    no limits for entries!no extra event management necessary, I just integrated a google calendar

    Read on wp.org ↗
  4. ★★★★★ sergibosch
    11mo ago

    Once set up correctly, it works smoothly. Initially, I was making updates to my iOS calendar and not seeing them instantly so that was stressing me out. I installed a caching plugin (Purge SG Cache by Siteground) and that took care of the instant refresh issue. Now I regularly update my iOS calendar and the updates appear without having to purge the cache. I still use the caching plugin at other times though and it’s helpful to have it.

    Read on wp.org ↗
  5. ★★★★★ jerrystewart99
    12mo ago

    Lovely functionality and appearance straight out of the box. I wanted to tweak the UX to have 2x calendars showing with interleaved events.. it just handles it perfectly. Many thanks for an excellent plugin.

    Read on wp.org ↗
  6. ★★★★★ Scott Kingsley Clark
    1.1y ago

    Excellent plugin and it just works. Was able to plug in an Outlook Office 365 ics file and it just works. That’s it, the plugin just works! Thanks for sharing with us.

    Read on wp.org ↗
  7. ★★★★★ cede007
    1.7y ago

    Very helpful plugin in conjunction with the events manager. Very fast, friendly and helpful support from the developer. It couldn’t be better!

    Read on wp.org ↗
  8. ★★★★★ radicoos
    2.0y ago

    I have been using the ICS Calendar plugin for about two years now, and it has been an invaluable asset to my membership site. Since implementing the plugin, member retention and engagement have significantly increased, as I can display all upcoming events in one place, keeping members connected and engaged. The plugin is incredibly powerful, flexible, and well-maintained with regular updates. I can’t say enough good things about the developer. As others have mentioned, his support is outstanding, he goes above and beyond to troubleshoot and resolve issues, even when it’s clear the problem is caused by conflicts from other plugins. Highly, highly recommended

    Read on wp.org ↗

Latest updates

via wp.org changelog

Recent releases and news for this plugin

  1. — Version 12.1.2 Week view: Fixed issue that prevented events from displaying when displaying the current week only or limiting the display to fewer than 8 days. CSS: Changed z-index on event hover to avoid conflict with Modern Events Ca 12.1.2
  2. — Version 12.1.1.1 AJAX: Adjusted minimum refresh time from 5 minutes to 2 minutes, and added a 10-second delay, to account for any lag in clearing the cache. (Actual refresh rate is based on the Transient (cache) expiration setting.) Prin 12.1.1.1
  3. — Version 12.1.1 Admin: Fixed issue of a large number of irrelevant, version-related admin notices appearing on initial installation. Modified r34ics_admin_full_access() function, adding the $multisite_check parameter. This allows for co 12.1.1
  4. — Version 12.1.0 Script loading: Re-introduced conditional enqueuing of static assets (JavaScript and CSS files), which had been removed in an earlier update due to inconsistent behavior. This new method has been tested against the 40 mo 12.1.0
  5. — Version 12.0.10 Event descriptions: Added eventdesclinkfix shortcode parameter. Changed r34ics_maybe_make_clickable() function so that, when eventdesclinkfix is used, it will return the text string as-is if it contains any HTML. The ass 12.0.10
  6. — Version 12.0.9.2 Changed id attribute on AJAX container (appended -ajax ) so it isn’t redundant with the id of the calendar itself after loading. Note: Due the fact that its single change would serve no useful purpose on its own, version 12.0.9.2

Security history

via Wordfence Intelligence

All 4 disclosed vulnerabilities are patched in the current version (12.3.0). Sites still on an older version should update.

  1. 2026-07-10 CVE-2026-59516 Improper Neutralization of Input During Web Page Generation Affects <= 12.1.1 Patched in 12.1.1.1
  2. 2026-07-09 CVE-2026-9838 Improper Neutralization of Input During Web Page Generation Affects <= 12.0.9 Patched in 12.0.9.2
  3. 2023-10-26 CVE-2023-46784 Improper Limitation of a Pathname to a Restricted Directory Affects <= 10.12.0.2 Patched in 10.12.0.3
  4. 2023-10-23 CVE-2023-46784 Improper Limitation of a Pathname to a Restricted Directory Affects < 10.12.0.2 Patched in 10.12.0.2

Vulnerability records provided by Wordfence Intelligence. Copyright 2012-2026 Defiant Inc. License and terms.

CVE records: Copyright 1999-2026 The MITRE Corporation. CVE terms of use.

Behavioral tests

via WP Hive

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

✓ Low memory footprint
✓ Low page-speed impact
✓ Runs on latest PHP + WP
✓ No PHP errors
✓ No JS errors
✓ Activates cleanly
✓ No resource errors
✓ No external HTTP errors
✓ Optimized database use
✕ Frequently updated

Languages

via translate.wordpress.org

Translated into 14 languages, 0 at 90% or more

Korean 74%
Czech 55%
Greek 44%
Dutch 41%
Esperanto 35%
German (Formal) 30%
Italian 26%
Russian 13%
Polish 6%
German 3%
Swedish 3%
Danish 2%
Dutch (Formal) 2%
Spanish (Spain) 1%

AI assistants

How it's measured →

Whether ChatGPT and Claude name this plugin when asked the category question, and whether the readme gives them something to quote.

Not measured yet for this plugin’s topics. Its tracked searches are not among the measured topics. See the topics measured so far.

Readme readiness

5 of 8 pass · checked 26 Oct 2026

Can an assistant quote this readme? Eight deterministic checks over the wp.org listing, no model involved.

  • ✓ Says what it does "Add the calendar you already use to any WordPress site! Google Calendar, Microsoft 365, iCloud and more… no..."
  • ✓ Has a FAQ 6 questions in the FAQ.
  • ✓ FAQ asks real questions 6 of 6 read like questions a user would type.
  • ! Names who it is for Never says who the plugin is for or what they use it for.
  • ! Names what it works with Names no plugin, service or platform it works with.
  • ! Headings and lists 3 headings and 0 lists; assistants quote headed sections and bullet lists, not paragraphs.
  • ✓ Enough to quote 1,943 characters of description.
  • ✓ Tags match the text All 5 tags appear in the text.

Growth timeline

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

  1. 2022-10-12 9K+ → 10K+ up after 11 days in tier
  2. 2022-10-01 7K+ → 9K+ up after 236 days in tier
  3. 2022-02-07 6K+ → 7K+ up after 109 days in tier
  4. 2021-10-21 4K+ → 6K+ up after 243 days in tier
  5. 2021-02-20 3K+ → 4K+ up after 194 days in tier
  6. 2020-08-10 2K+ → 3K+ up after 211 days in tier
  7. 2020-01-12 1K+ → 2K+ up

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).

Embed this report card

Drop a live Pulse card for ICS Calendar into a readme, a review or a deck. It updates itself.

<iframe src="https://plugins.wpmayor.com/embed/ics-calendar" width="480" height="300" style="border:0" loading="lazy" title="ICS Calendar — Plugin Pulse"></iframe>
Preview card ↗

ICS Calendar: 10K+ active installs, 4.9★ (72 reviews). Plugin Pulse (WP Mayor), as of 2026-10-31. https://plugins.wpmayor.com/plugin/ics-calendar

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