Calendar.online / Kalender.digital – Plugin

by kalender.digital

View on WordPress.org

75 Quality Score

Active Installs

15/30

At roughly 2,000 active installs, the plugin has a modest niche footprint that earns a near-passing popularity score.

Update Freshness

25/25

The last update landed on 2026-02-09 and it is tested against WordPress 6.8.5, which is current, so maintenance is excellent.

User Rating

13/15

With a 88/100 score across 7 ratings, user sentiment is strong but the small sample size means the rating should be read as 'people who installed it liked it,' not statistically meaningful.

Support Health

8/15

There are zero support threads and zero resolved tickets, which is treated neutrally because it suggests few users felt the need to ask, but it also gives no evidence the developer actively engages.

WP Compatibility

15/15

It supports WordPress 4.6+ and PHP 5.3+, giving broad compatibility, but the very old PHP floor suggests it likely does not leverage newer PHP features or strict typing.

Scores higher than 43% of indexed plugins

About

Plugin for the integration of a free calendar from Calendar.online or Kalender.digital

Active Installs 2k+

Rating ★★★★ 4.4/5

Last Updated 2026-07-17 9:44am GMT

Requires WordPress 4.6+

Tested Up To 7.1

Requires PHP 5.3+

Security History

2 known vulnerabilities, all patched

2 Medium

Most recent: December 31, 2025

View details ▸

What It Does

Calendar.online / Kalender.digital embeds a hosted calendar from the Calendar.online or Kalender.digital service into a WordPress site via a shortcode. It is essentially a display wrapper for an external booking or event calendar, with the scheduling logic living on the third-party platform rather than inside WordPress.

Who It's For

This plugin fits small European-based businesses, community organizers, and solo professionals who already use (or plan to use) the Calendar.online or Kalender.digital hosted booking service and just need a simple way to expose that calendar on a WordPress page. It is most useful for appointment-light use cases where the external service handles availability, customer data, and notifications.

Who Should Skip It

Anyone who needs native WordPress event management, ticket sales, RSVP tracking, or WooCommerce integration should skip this plugin, since it is just an embed for an external service and does not store events locally. Larger sites or those needing deep customization and reliable developer support will outgrow it quickly.

The Bottom Line

Calendar.online / Kalender.digital is a tidy, well-maintained embeddable calendar with strong recent updates but very limited reach and no trackable support history. It is a sensible pick only if you already rely on the Calendar.online or Kalender.digital hosted service; otherwise, The Events Calendar or SimplyBook.me will serve you better.

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WP Simple Booking Calendar 81/100

Pick this for a lightweight, fully WordPress-hosted availability or rental calendar without any third-party dependency.

SimplyBook.me – Booking and reservations calendar 81/100

Pick this when you need a more mature third-party booking SaaS with stronger notifications, payments, and client management.

EventON – Events Calendar 81/100

Pick this for a premium-styled, feature-rich events calendar with strong visual design and add-on extensibility.