Calendar.online / Kalender.digital – Plugin
by kalender.digital · Booking & Events
Plugin for the integration of a free calendar from Calendar.online or Kalender.digital
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 86/100
Few reviews
Active installs
2K+
≈2.9K estimated
Momentum
+43%
downloads vs prior 30d
Biggest opportunity: One page off on “planner”. #15 puts you just past the first ten results, where almost all the clicks stop. The gap to close is small.
86 health vs 69 average across 1,838 Booking & Events plugins
Install conversion
How it's measured →5.7%
of downloads still active
At least 2K of 35.1K lifetime downloads are still running, above 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 1 release 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
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.
Excellent listing optimization
Most to gain: Rating quality
Updated 107 days ago
Tested up to WordPress 7.1.4, the current branch or newer
4.4★ over 7 reviews, smoothed to 4.14★ and held back under 25 reviews
5 of 5 tags set · short description in place
To rank higher: Too few reviews to rank on quality — nudge happy users to leave one.
Get the full rank-higher report →Search visibility
How it's tracked →Directory searches this plugin turns up in, and which way each one is moving. WordPress.org publishes no history of search positions, so this starts the day we first tracked a keyword and never backfills.
44
Momentum
Holding steady
-0.4
Velocity
places per keyword, 27d
36%
Breadth
of keywords climbing, 27d
+0.1
Acceleration
recent half vs earlier
wp.org is where the directory puts the plugin for that search. On merit is where it would sit if results were ranked on rating, support and updates, without the install boost. The last column is how far the wp.org position moved, from our first reading in the last 90 days to the latest.
| Keyword | wp.org | On merit | wp.org move, 90 days |
|---|---|---|---|
| planer your tag | #1 | #3 | 0 |
| kalender your tag | #2 | #2 | 0 |
| event planner | #8 | #15 | 0 |
| planner your tag | #15 | #20 | down 3 |
| calendar your tag | Not in the top 24 | ||
| event your tag | Not in the top 24 | ||
15 searches this plugin appeared in over the last 90 days, 4 listed. 11 left out as unrelated or noise (years, numbers, stray words). 2 of its tags aren't in the top 24 for their own search.
What to do about it
- One page off on “planner”. #15 puts you just past the first ten results, where almost all the clicks stop. The gap to close is small.
- “calendar” and “event” aren't earning a slot. You list them, but you're not in the first 24 results for those searches. WordPress.org counts only your first five tags, so free the slot for a search you can win.
Daily downloads
Since 5 Oct 2022 · 1,488 days · wp.org + Plugin Pulse archive
30-day downloads
Rolling 30-day volume · peak 3.2K · peaks are release surges
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
Rating trend
Star average over time · dips mark rough releases
Health trend
Composite health score, snapshotted daily
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.
Release cadence
Occasionally updatedHow often this plugin actually ships. A steady rhythm is the maintenance signal a single "last updated" date can't show.
1
releases in the last 12 months
4mo ago
latest release · v1.0.14 · 17 Jul 2026
12
tagged releases on record
Recent releases
What its installed base runs
via wordpress.orgShare 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.
Estimated active installs
The public count shows “2K+”. Our estimate pins where the real number sits.
Crossed into this band 3.2 years ago; the previous band took 2.7 years to cross, which places it about 90% of the way through.
Install history since 26 Aug 2019
Recent reviews
All reviews on wp.org ↗- ★★★★★ wiggiman4.8y ago
Lange habe ich für einen Verein nach einem einfachen Kalender gesucht, der auch für Personen geeignet ist, die nur gelegentlich PC oder mobile Systeme verwenden. Das Plugin hat mich dabei umgehauen! Die Berechtigung für Leser, Bearbeiter und Administatoren sind über Links vergeben. Es ist nicht einmal erforderlich, sich über WordPress anzumelden. Die Termineingabe als Bearbeiter ist so intuitiv, wie man sich das wünscht. Einfach den Kalender aufrufen, Datum auswählen, Termin eingeben, fertig! Obwohl die Termineingabe so simpel ist, sind Exporte für die unterschiedlichsten Zwecke möglich. Richtig genial finde ich z.B. die Weiterleitung eines Termins als E-Mail! Echt ein Hammer. Die Einbettung in WordPress hat fehlerfrei funktioniert. Der Kalender verhält sich responisive und passt automatisch sein Aussehen an. Fazit: Funktional, delegierbar, stabil und einfaches Handling. 100 Punkte! Für Vereine, Teams, Musik-Bands, usw. ist das PLugIn optimal. Ich habe mich sehr gefreut das Plugin gefunden zu haben und es nutzen zu können. Hut ab!
Read on wp.org ↗ - ★★★★★ scrlk5.5y ago
I think this is really a fantastic calendar for people that want to allow shared access without the nightmare of different logins and user profiles. It’s great if you have a sports team you’re coaching, want to manage kids events, social clubs, or just about anything else. Very simple to use and full of features. I really like that it offers an ics download for integration into other calendars, such as google. Top notch product and no complaints.
Read on wp.org ↗ - ★★★★★ edb19546.6y ago
Really a very good calender. Clean work, super documentation. The team did an excellent job. Thank you very much.
Read on wp.org ↗ - ★★★★★ lonelylovers6.9y ago
In our hobby club we are doing a lot of love. But there is not enough to spend for this awesome plugin! Love you guys :-* This topic was modified 6 years, 7 months ago by lonelylovers.
Read on wp.org ↗ - ★★★★★ lsvwernsrode6.9y ago
This plugin works fine for teams and hobby clubs
Read on wp.org ↗ - ★★★★★ rainerbtrug7.0y ago
DAs Plugin lässt sich weder vom Stil anpassen noch ist es als Widget nutzbar. Besonders das Design ist abschreckend, da groß und kindlich bunt. Leider für meine Zwecke nicht ansatzweise denk- oder nutzbar.
Read on wp.org ↗ - ★★★★★ mciupka7.6y ago
Die beiden süßen Boys aus Düsseldorf haben da was ganz Duftes gebastelt. Nutze den Kalender für meinen Friseursalon. Macht weiter so! Tschüssi Euer Pascal
Read on wp.org ↗
Latest updates
via wp.org changelogRecent releases and news for this plugin
Security history
via Wordfence IntelligenceAll 2 disclosed vulnerabilities are patched in the current version (1.0.14). Sites still on an older version should update.
- Patched Medium · 6.4 Calendar.online / Kalender.digital <= 1.0.13 - Authenticated (Contributor+) Stored Cross-Site Scripting ↗2025-12-31 CVE-2025-62752 Improper Neutralization of Input During Web Page Generation Affects <= 1.0.13 Patched in 1.0.14
- Patched Medium · 6.4 Calendar.online / Kalender.digital <= 1.0.8 - Authenticated (Contributor+) Stored Cross-Site Scripting ↗2024-07-10 CVE-2024-38678 Improper Neutralization of Input During Web Page Generation Affects <= 1.0.8 Patched in 1.0.9
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 HiveAutomated install-time checks, tested on PHP 8.1.12 · WP 7.0.1
Languages
via translate.wordpress.orgTranslated into 4 languages, 3 at 90% or more
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
3 of 8 pass · checked 26 Oct 2026Can an assistant quote this readme? Eight deterministic checks over the wp.org listing, no model involved.
- ! Says what it does Short description names no action; say what the plugin does for the site.
- ! Has a FAQ Only 1 question in the FAQ; 3 or more gives an assistant something to match.
- ! FAQ asks real questions 0 of 1 FAQ entries are headings, not questions ("undefined").
- ! Names who it is for One audience phrase ("if you have"); say who the plugin is for and what they use it for.
- ! Names what it works with Names no plugin, service or platform it works with.
- ✓ Headings and lists 5 headings and 1 list.
- ✓ Enough to quote 1,426 characters of description.
- ✓ Tags match the text 3 of 5 tags appear in the text; "planer", "planner" do not.
Growth timeline
Install-tier crossings we have observed, and how long each tier took to outgrow
- 2023-08-08 1K+ → 2K+ up after 978 days in tier
- 2020-12-03 800+ → 1K+ up after 104 days in tier
- 2020-08-21 700+ → 800+ up after 101 days in tier
- 2020-05-12 400+ → 700+ up after 151 days in tier
- 2019-12-13 200+ → 400+ 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).
-
The Events Calendar 600K+ installs · 4.2★ · 2 shared tags A -
Timetable and Event Schedule by MotoPress 30K+ installs · 4.3★ · 2 shared tags A -
WP Event Manager – Events Calendar, Registrations, Sell Tickets with WooCommerce 20K+ installs · 4.0★ · 2 shared tags B -
The Events Calendar Shortcode & Block 10K+ installs · 4.6★ · 2 shared tags A -
Events Shortcodes For The Events Calendar 10K+ installs · 4.8★ · 2 shared tags A -
Events Calendar by FooEvents 4K+ installs · 3.8★ · 2 shared tags B
Embed this report card
Drop a live Pulse card for Calendar.online / Kalender.digital – Plugin into a readme, a review or a deck. It updates itself.
<iframe src="https://plugins.wpmayor.com/embed/kalender-digital" width="480" height="300" style="border:0" loading="lazy" title="Calendar.online / Kalender.digital – Plugin — Plugin Pulse"></iframe> Calendar.online / Kalender.digital – Plugin: 2K+ active installs, 4.4★ (7 reviews). Plugin Pulse (WP Mayor), as of 2026-11-01. https://plugins.wpmayor.com/plugin/kalender-digital
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