Aprus Appointment Calendar WordPress Plugin

Q: How do I display the weekly column view?

Use [apruapca_calendar view="columns"] in the shortcode, or pick Aprus Appointment Calendar (columns) in the block editor / widgets.

Q: Can I cancel a booking?

Yes. In Appointments → Calendar , hover a blue (booked) slot — a popover appears with client details and a “Cancel booking” button. The client gets an e-mail notification. You can also cancel from Appointments → Bookings .

Q: Does it support 12-hour time format?

Yes. The calendar reads your Settings → General → Time format — H:i shows 24-hour times ( 13:00 ), g:i a shows 12-hour ( 1:00 pm ).

Q: Does the week start on Monday or Sunday?

Whatever you set in Settings → General → Week starts on .

Q: Does the plugin phone home / call external services?

No. All data stays in your WordPress database. E-mails use wp_mail() .

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Vulnerabilities

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No known vulnerabilities

This plugin has no records in the Wordfence Intelligence vulnerability database.

About Aprus Appointment Calendar

Lightweight, free appointment booking calendar. Shortcode, widget, Gutenberg block. Drag-select availability in admin. English & Polish.

Aprus Appointment Calendar is a lightweight, no-frills booking plugin. You set your opening hours, drag-select the exact slots you want to be bookable, and clients book through a clean calendar embedded anywhere on your site.

Features

Two client views — monthly calendar and weekly column layout
Embed anywhere — [apruapca_calendar] shortcode, classic widget or Gutenberg block (Aprus Appointment Calendar / Aprus Appointment Calendar (columns))
Admin availability grid — drag-select a rectangle over slots to open or close them in bulk. Booked slots are protected from accidental change.
Appointment duration + break — control slot generation with duration and buffer between visits
Working days & hours — per-day-of-week toggle, lead time (earliest booking), calendar range (how far ahead)
Booking popover — hover a booked slot in admin to see client details and cancel with one click; cancellation sends an e-mail notification
Automatic locale — Polish or English based on WordPress site language, English by default
Respects your WP settings — start_of_week (Monday vs Sunday), time_format (24h / 12h AM-PM)
E-mail notifications — customer + admin messages via wp_mail()
No accounts required — clients book by e-mail

Free and open source

The plugin is fully free — no premium tier, no artificially blocked features. If you find it useful, you can buy me a coffee on Ko-fi or on buycoffee.to. It helps me keep the project maintained.

Privacy

The plugin stores appointment data (name, e-mail, phone, note, date, time) in your own WordPress database. Nothing is sent to third-party servers. E-mails go through the standard wp_mail() function.

Screenshots

Monthly calendar view for clients — pick a day, then a time slot

Weekly column view — days as columns, slots as rows

Admin availability grid — drag-select to open/close many slots at once

Hover a booked slot to see client details and cancel with one click

Plugin settings

Frequently Asked Questions

How do I display the weekly column view?

Use [apruapca_calendar view="columns"] in the shortcode, or pick Aprus Appointment Calendar (columns) in the block editor / widgets.

Can clients see all slots by default?

No. In this plugin nothing is bookable until you explicitly open slots in Appointments Calendar. Drag over the slots you want to make available.

Can I cancel a booking?

Yes. In Appointments Calendar, hover a blue (booked) slot — a popover appears with client details and a “Cancel booking” button. The client gets an e-mail notification. You can also cancel from Appointments Bookings.

Does it support 12-hour time format?

Yes. The calendar reads your Settings General Time format — H:i shows 24-hour times (13:00), g:i a shows 12-hour (1:00 pm).

Does the week start on Monday or Sunday?

Whatever you set in Settings General Week starts on.

Does the plugin phone home / call external services?

No. All data stays in your WordPress database. E-mails use wp_mail().

Ratings & Reviews

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Changelog

2.5.0

Month view now colours each day by availability — days with open slots get a green tint and dot, fully-booked days are greyed out and not clickable, with a small legend below the calendar
Redesigned the empty “no free slots” state (centred icon + message) instead of a cramped line of text
Spam / bot protection for the public booking form, all configurable under Settings Spam protection (on by default, no external services): honeypot field, time trap (rejects submits faster than a human — default 3s) and a per-IP rate limit (default 5 bookings / 60 min)
Unique prefixes across the whole plugin, per WordPress.org review feedback: functions, classes, constants, options, hooks, nonces, AJAX actions, menu slugs, script/style handles, widget id, block namespaces and the custom table renamed from the 3-letter sac prefix to apruapca (8 chars)
Renamed the shortcode from the generic [appointment_calendar] to [apruapca_calendar] for the same uniqueness requirement
Wrap global variables in uninstall.php in a prefixed function
Refreshed the front-end booking form — a summary chip with calendar icon for the chosen slot, uppercase field labels with clearer spacing, larger inputs, and a redesigned confirmation / error message (status icon, subtle fade-in, no empty space reserved before a booking is made)
Verified on a clean WP_DEBUG install — no notices, warnings or deprecations across activation, front-end views, all AJAX endpoints, the full booking lifecycle, settings save and uninstall

2.4.4

Pass all Plugin Check audits: WordPress coding standards, i18n compliance, DB safety, output escaping
Migrate SQL queries to modern %i identifier placeholder (requires WordPress 6.2+)
All translatable strings go through __() with English source (Poedit / GlotPress friendly)
Add translators: comments on placeholders in e-mail templates
Replace date() with gmdate() for timezone-safe date math
Ordered sprintf placeholders (%1$s, %2$s) in all multi-arg strings

2.4.3

Switch to WordPress standard i18n with .pot / .po / .mo files (in /languages/)
All source strings are English; Polish translation shipped as aprus-appointment-calendar-pl_PL.mo
Localized month and weekday labels use WordPress core translations via wp_date()
Full code comments translated to English

2.4.2

Fix layout shift after selecting a day in the monthly view (theme CSS interference)
overflow: hidden on the calendar card so nothing escapes
min-width: 0 on grid children — prevents column widening under long content