How ICS Calendar Affects Your WordPress Speed

B+

Estimated Speed Score (based on plugin metrics)

Plugin Overview

Active Installs10K+

Rating4.9/5 (69)

Tested Up ToWP 6.9.1

Requires PHP7.2+

Last UpdatedFeb 7, 2026

Downloads1.7M+

AuthorRoom 34 Creative Services, LLC

WP.orgView on WordPress.org

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Performance Analysis

Performance Impact

ICS Calendar receives an estimated speed score of B+ based on our heuristic analysis of plugin metrics including update frequency, PHP requirements, active installs, and feature scope.

This plugin has a moderate performance footprint. For most sites, it should not cause noticeable slowdown. Monitor your site’s performance after installation.

Maintenance Status

Last updated: 2026-02-07. Requires PHP 7.2+. Trusted by 10K+ active installations.

Note: Speed scores are estimated from plugin metrics. Real-world performance varies depending on your server configuration, other active plugins, and how you use the plugin.

Alternatives to ICS Calendar

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Advanced Custom Fields (ACF®)	B	2M+
Kirki Customizer Framework	B-	500K+
WooCommerce Legacy REST API	D	400K+

Frequently Asked Questions

Does ICS Calendar slow down WordPress?

ICS Calendar has an estimated speed score of B+. It should have minimal impact on your site speed.

Is ICS Calendar still maintained?

ICS Calendar was last updated on 2026-02-07. It has 10K+ active installations, indicating it is a functional plugin with a dedicated user base.

What are the best alternatives to ICS Calendar?

Check our plugin reviews in the Developer category for alternatives. We compare plugins side-by-side on speed, features, and user ratings to help you find the best fit.