Freeslot Calendar
Read-only availability calendar with admin-managed events. Bilingual (BG/EN), shortcode-driven. Show visitors when you're free, no booking system.
Use with caution
Freeslot Calendar works, but test it on a staging site before relying on it in 2026. Was last updated 2 months ago, and scores 60/100 on our health check.
- Tested with the latest WordPress (7.1)
- Small user base (<10 active installs)
- Very few reviews so far
How does it stack up?
Side-by-side on installs, updates, ratings & support
Daily downloads
Download spikes usually follow a new release — each site that auto-updates counts as a download.
Rankings
Where Freeslot Calendar stands todayWordPress.org search rankings
Live position in the plugin search, top 100| Keyword | Position |
|---|---|
| appointments | >100 |
| availability | >100 |
| calendar | >100 |
| Freelancer | >100 |
| schedule | >100 |
About Freeslot Calendar
From the official readme · v1.7.20Description
Freeslot Calendar is a lightweight WordPress plugin that publishes a clean monthly availability view on any page or post. It’s built for freelancers, designers, photographers, consultants, and small studios who want visitors to see at a glance which days are open and which are busy, without exposing a full booking system.
Events live in your WordPress admin like any other content. The public calendar reads from them and paints each day as Free, Partially busy, or Fully busy based on your working hours.
Key features
- Drop-in shortcode —
[igcal_availability]renders the calendar anywhere. - Bilingual out of the box — Bulgarian and English, per-event title and note translations, automatic locale switching.
- Working-hours aware — partial vs. full busy status is computed from your actual day, not a guess.
- Recurring events — daily, weekly, monthly, with an end date.
- Per-event color, image, and category for richer day-detail cards.
- Customizable Contact CTA — label, colors, size, and the URL it links to.
- Customizable header — change the calendar’s title and subtitle per language, or pass a
title="..."shortcode attribute. - Accessible — full keyboard navigation (arrows, Home/End, PageUp/Down), ARIA roles, screen-reader announcements on month change.
- Mobile responsive — two-stage breakpoints, dense list view on phones.
- AJAX month navigation with skeleton loader and cross-fade transitions.
- Cached — each month grid is cached per language and invalidated automatically when events or settings change.
- No tracking, no external calls — your data stays on your site.
Shortcode attributes
months— number of months to render (default1).lang—auto(follow site locale),bg, oren.title— override the header title for this instance.show_legend—1or0.show_cta— show the bottom Contact CTA bar (1or0).
Example:
[igcal_availability lang="en" months="3" show_cta="0"]
Installation
- Upload the
freeslot-calendarfolder to/wp-content/plugins/(or install via Plugins → Add New → Upload). - Activate the plugin through the Plugins screen.
- Go to Freeslot Calendar → Settings to set working hours, language, colors, and the Contact CTA.
- Go to Freeslot Calendar → Events to add busy events.
- Drop
[igcal_availability]on any page or post.
Frequently asked questions
Does this plugin accept bookings?
No. It’s intentionally read-only — visitors see your availability and contact you through whatever channel you configure (email, form, Calendly link, etc.). This keeps the plugin small, fast, and easy to reason about.
Does it support languages other than Bulgarian and English?
Out of the box the calendar ships with bg_BG and en_US translations. The plugin is fully internationalized (Text Domain: freeslot-calendar), so additional locales can be added via standard .po/.mo files.
Can I have multiple calendars on different pages?
Yes — the shortcode can be placed on any page or post. All instances share the same event pool and settings (there is currently one global calendar, not multiple separately-managed ones).
Does it work with my caching plugin?
Yes. Month grids are cached via WordPress transients with automatic invalidation on event save and settings change. Page-level cache plugins work fine because the AJAX month-nav endpoint is unauthenticated and idempotent.
Will it slow down my site?
Assets (CSS / JS / fonts) only load on pages that actually contain the shortcode. The initial month is server-rendered; subsequent months are fetched via a single small AJAX call.
Is the public calendar keyboard-accessible?
Yes. Tab into the grid, then use arrow keys to move between days, Home/End for first/last day of the visible month, and PageUp/PageDown to jump between months. Today’s cell is marked with aria-current="date" and month changes are announced via an ARIA live region.
Changelog
Internal rename for WordPress.org compliance. Important: the shortcode tag changed from [availability_calendar] to [igcal_availability]. If you used the old shortcode on any pages, update them after upgrading. Existing events and settings are preserved.
1.7.20
- Fix: the event-form Live Preview panel (and the media-picker / “Copied” labels) now follow the admin locale instead of always showing Bulgarian. Strings are passed from PHP to JS via
wp_localize_script, with translations for the time abbreviations (“ч”/”h”, “м”/”m”) and the image-picker buttons.
1.7.19
- Removed
Author URIfrom the plugin header (the WordPress.org review team requires domain-ownership verification when an Author URI is set, and the simplest path was to drop the line). Author credit “Krasimir Ignatov” is unchanged.
1.7.18
- Renamed plugin to “Freeslot Calendar” (slug
freeslot-calendar) at the request of the WordPress.org review team, who flagged the previous name as too generic. Text domain, language files, and folder name updated to match.
1.7.17
- Removed
Plugin URIfrom the plugin header — WordPress.org rejects submissions where Plugin URI and Author URI point to the same site. Author URI (https://ignatovdesigns.com/) stays.
1.7.16
- Renamed the leftover
ignatov_calendar_force_assetsfilter toigcal_force_assetsso the hook name matches the plugin’s prefix (caught by Plugin Check after the rename). - Updated
Contributors:field in readme.txt tokrasimirignatov(matches the WordPress.org account that will own the plugin).
1.7.15
- Fix: post-activation welcome notice now displays in English when the admin locale is English. The main message string was missing from the .po files entirely, and the “Add your first event →” string had an arrow inside the gettext call that didn’t match the .po msgid. Both are now in sync.
For developers
Is this your plugin? Show off the numbers.
Add a live badge to your site, docs or GitHub README. It updates on its own — no account needed.
Best Freeslot Calendar alternatives
All appointments plugins →
FAQ
Freeslot Calendar: quick answers
Straight answers, pulled from live WordPress.org data.
Live data from WordPress.org · checked Oct 13, 2026
Is Freeslot Calendar free?
Yes. Freeslot Calendar is free to download and use from the official WordPress.org plugin directory.
Is Freeslot Calendar safe to use in 2026?
Freeslot Calendar works, but test it on a staging site before relying on it in 2026. Was last updated 2 months ago, and scores 60/100 on our health check.
How many websites use Freeslot Calendar?
Freeslot Calendar is active on <10 WordPress websites and has been downloaded 324 times since it launched in May 2026. It was downloaded 63 times in the last 30 days.
Does Freeslot Calendar work with WordPress 7.1?
Yes. The developer has tested Freeslot Calendar up to WordPress 7.1.3, the latest release. It requires WordPress 6.0 or newer.
What PHP version does Freeslot Calendar need?
Freeslot Calendar requires PHP 7.4 or higher. Most hosts run PHP 8.x today, so it works on any modern WordPress hosting.
When was Freeslot Calendar last updated?
The latest version, 1.7.20, was released on August 20, 2026 (2 months ago).
Who makes Freeslot Calendar?
Freeslot Calendar is developed and maintained by Krasimir Ignatov.
What are the best alternatives to Freeslot Calendar?
The most popular alternatives to Freeslot Calendar are Booking for Appointments an… (90K+ installs), Events Manager (60K+ installs) and Online Scheduling and Appoi… (60K+ installs).
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