gvadev

Cal24h is an online booking platform that lets you publish event calendars, appointment forms, and catalogues. This plugin embeds any Cal24h organization or event on your WordPress site with just a shortcode or block, while offering a floating button modal for persistent calls to action.
Highlights
<ul>
<li>Gutenberg block with an inspector panel to configure organization, event, language, and appearance.</li>
<li>Shortcode <code>[cal24h]</code> supporting attributes for iframe or floating-button display modes.</li>
<li>Settings page (<code>Settings → Cal24h</code>) to define default values such as organization slug, event slug, language, and colors.</li>
<li>Theme personalization parameters for the stepper (primary colors, step labels, card backgrounds, stepper background).</li>
<li>Responsive floating button that opens a customizable modal overlay.</li>
<li>Ready-to-ship translations and language loading for both editor and front end. Included locales: ar, bn_BD, da_DK, de_DE, el, en_US, es_ES, fa_IR, fi, fr_FR, he_IL, hi_IN, id_ID, it_IT, ja, ko_KR, nb_NO, nl_NL, pa_IN, pt_BR, pt_PT, ru_RU, sv_SE, sw, tr_TR, ur, wo, zh_CN.</li>
<li>Paste-friendly slugs: you can paste a full Cal24h URL (e.g., <code>https://cal24h.com/integration/org/event</code>) into settings or shortcode attributes — the plugin extracts the correct organization/event automatically.</li>
</ul>

Cal24h

Embed the Cal24h booking experience in WordPress with a shortcode, Gutenberg block, or floating modal.

veneliniliev

aevtimov

Reservation.Studio is an online booking platform for service-based businesses. The plugin adds a booking widget to your WordPress site and connects your website with your Reservation.Studio / Reservation.Business profile.
Main capabilities: 
– Enable or disable widget loading from WordPress admin. 
– Configure booking page type and slug. 
– Choose language (<code>Auto detect</code>, English, Bulgarian). 
– Configure sticky button text, colors, position and tooltip behavior. 
– Configure modal max width and max height. 
– Optionally bind widget opening to custom CSS selectors. 
– Embed booking triggers with shortcodes <code>[reservation_studio_button]</code> and <code>[reservation_studio_anchor]</code>. 
– Render booking directly inline with <code>[reservation_studio_embed]</code> (iframe, no modal).
The admin settings screen validates input and shows field-specific error messages directly on the relevant fields.
<h4>Sign up for free</h4>
Sign up for a free Reservation.Business account at <a href="https://reservation.business/" rel="nofollow ugc">reservation.business</a>, no credit card required. The Free version includes unlimited appointments, clients, employees, locations and the Desktop, iOS and Android app.
Please click here for more information on <a href="https://reservation.business/pricing/" rel="nofollow ugc">Pricing.</a>

Reservation.Studio widget

Reservation.Studio WordPress booking widget

Cal24h vs Reservation.Studio widget