AnnoVisio vs Koalendar – Easy Appointment Scheduling & Booking Plugin

AnnoVisio displays events from Calendly or a public iCalendar/ICS feed in a compact yearly calendar and list view through the shortcode [annovisio]. The fixed standard configuration uses exactly one source: one Calendly account connected with a Personal Access Token, or one public iCalendar/ICS feed from Google Calendar, Microsoft Outlook, Apple Calendar, or another compatible calendar system. For Calendly sources, AnnoVisio synchronizes event types and occurrences, supports multi-day Calendly events, checks availability before booking, and opens the official Calendly booking popup when a bookable event is selected. For iCalendar/ICS sources, the configured public feed is fetched server-side with the WordPress HTTP API and normalized into a WordPress transient. The configured calendar name and color are applied when the overview is rendered, so changing these display settings does not require a new feed fetch. No external frontend assets are loaded for iCalendar output. The year grid is the default view. Event bars open a local detail dialog with title, date, calendar name, description, event URL when available, and the calendar page URL. The plugin displays the shortcode page itself as the event archive. It does not create event posts, standalone event detail pages, Google OAuth connections, or write access to any calendar. Key features: Yearly calendar with event detail dialog Calendar and list views Public iCalendar/ICS feed support Support for public feeds from Google Calendar, Microsoft Outlook, Apple Calendar, and other compatible calendar systems Configurable calendar name and color for the iCalendar/ICS feed Server-side iCalendar/ICS fetching and transient-based caching Manual iCalendar/ICS refresh and display-cache update Recurring iCalendar/ICS events with RDATE and EXDATE support Visible frontend errors for unavailable configurations, feed fetch errors, or parser errors Calendly event type and occurrence synchronization Manual or optional automatic Calendly synchronization Multi-day Calendly events Direct Calendly booking popup Availability and sold-out checks before booking Manual display-cache update without starting a Calendly synchronization External services The plugin contacts external services only when the corresponding source is configured. Public iCalendar/ICS feed When an iCalendar source is selected, the plugin sends a server-side HTTP GET request to the public ICS URL entered by the site administrator. The feed can come from any calendar provider that offers a public iCalendar/ICS feed URL, for example Google Calendar, Microsoft Outlook, Apple Calendar, or another compatible calendar system. The request is made from the WordPress server using the WordPress HTTP API when the cache is empty or when an administrator uses the manual refresh action. The request is used only to retrieve and parse the calendar data. The requested calendar provider receives the server request, including normal HTTP request metadata such as IP address and user agent. The plugin does not send visitor data to the feed URL from the browser and does not load external frontend assets for iCalendar output. Administrators should only configure a public iCalendar/ICS feed URL whose provider, terms of service, and privacy policy are acceptable for their website. The destination and its terms and privacy policy depend on the service chosen by the administrator. Calendly When Calendly is selected, the plugin uses Calendly to synchronize event data, check availability, and open the official booking popup. External Calendly resources: Service: https://calendly.com API: https://api.calendly.com Widget script: https://calendly.com/assets/external/widget.js Widget stylesheet: https://calendly.com/assets/external/widget.css What is sent and when: During manual or automatic synchronization, authenticated server-side GET requests are sent to the Calendly API with the Personal Access Token configured by the administrator. The plugin requests the connected user, active event types, occurrences, and available times required by the existing synchronization and availability logic. When a visitor clicks a Calendly event, the browser first calls this plugin’s REST endpoint on the same WordPress site. The plugin then checks the relevant event type, date, or UTC slot against Calendly. The Calendly widget script and stylesheet are loaded only on calendar output that contains a Calendly source. Booking interactions inside the popup are handled by Calendly. Calendly legal information: Terms: https://calendly.com/legal/customer-terms-conditions Privacy: https://calendly.com/legal/privacy-notice

Koalendar is a WordPress booking and appointment scheduling plugin that lets visitors book meetings, services, and appointments directly from your website. It removes the back and forth emails and manual coordination by syncing bookings automatically with your calendar. Built for WordPress users, Koalendar is easy to install, simple to configure, and works out of the box for individuals and small teams. It keeps availability up to date, prevents double bookings, and helps you turn any WordPress site into a complete online booking system in just minutes, with a Free Forever plan to get started. See Koalendar in action Watch how easy it is to set up and start accepting bookings on your WordPress website: Top Features WordPress booking and appointment scheduling plugin Unlimited booking pages and appointments Calendar sync with Google Calendar, Outlook, and iCloud Accept online payments for services and appointments Personalized booking pages that match your website design Multiple appointment types with custom durations Group bookings and classes with attendee limits Smart availability rules, buffers, and time off Team scheduling with shared and round robin availability Automated booking confirmations and reminders Easy embedding using WordPress blocks, shortcodes, or widgets Perfect for Koalendar is designed for small businesses, professionals, and teams who need a reliable scheduling system: Consultants and freelancers Coaches, tutors, and educators Agencies and remote teams Service based businesses Sales teams booking meetings and demos Anyone who needs an online scheduling calendar on their WordPress website Integrations Koalendar integrates seamlessly with the tools you already use, so your online booking system, calendar, and business workflows stay perfectly aligned. This allows you to manage appointments, meetings, and services without manual updates or double bookings. Calendar integrations with Google Calendar, Outlook, and iCloud to keep availability accurate in real time Video meeting integrations with Google Meet and Microsoft Teams, automatically generating meeting links for online appointments Payment integrations with Stripe, allowing clients to pay when they book an appointment or service Automation platforms such as Zapier, Make, n8n, and Pabbly to connect Koalendar with hundreds of apps and automate follow ups or internal workflows WordPress friendly setup, plus productivity tools like a Chrome extension for quickly sharing booking links Personalized Booking Pages Create clean, professional booking pages that match your brand and website design. Your visitors can make an appointment without leaving your website. Customize colors and layout Share a direct booking link or embed on any page Works with WordPress blocks, shortcodes, or widgets Optimized for desktop and mobile users Smart Availability and Calendar Sync Koalendar connects to all your existing calendars to keep your schedule accurate at all times. Sync with Google Calendar, Outlook, and iCloud Prevent double bookings automatically Set working hours, buffers, and time off Control availability per meeting or service Team Collaboration Built for teams that need shared scheduling. Schedule meetings with multiple team members Round robin and collective availability options Each team member connects their own calendar Perfect for agencies and growing small businesses Multiple Services and Appointment Types Koalendar lets you create multiple services and appointment types within a single booking system, each with its own duration, availability, and rules. This makes it easy to offer different kinds of meetings or services on your WordPress website without juggling multiple calendars or tools. Visitors simply choose the service they need and book an appointment online that fits your schedule. For example, a service based business such as a wellness studio, repair service, or local professional can create appointment types like initial visits, recurring services, or premium sessions, each with its own time length and booking rules, making it easy for customers to schedule the right service directly from the website. Group Bookings and Classes Koalendar makes it easy to manage group bookings and classes directly from your WordPress website. You can allow multiple attendees to book the same session, set participant limits, and keep everything organized in one scheduling system. This is ideal for workshops, coaching programs, fitness or wellness classes, and training sessions, where multiple people need to book the same time slot while you stay in control of capacity and availability. Custom Automations and Reminders (included in PRO plan) Send personalized confirmation and reminder emails before each appointment or meeting. This helps keep clients informed, reduces no shows, and saves time spent on manual follow ups. Custom Booking Forms (included in PRO plan) Collect additional information at the time of booking, such as contact details, service preferences, or special requests. This is especially useful for service businesses that need context before an appointment. Payments (included in PRO plan) Accept online payments for appointments and services directly through your booking system. Charge for consultations, classes, or sessions in advance to simplify billing and secure bookings before they happen. Backlog updates Here are some recent product updates: Appointment types (services): list multiple services directly on your booking page, each with its own price and duration Multiple and recurring bookings: invitees can book multiple dates, or set up recurring bookings, in a single flow Booking durations in hours or days: configure event durations using hours or days New booking page editor: redesigned editor for faster page creation and updates Koalendar available in Spanish and French File upload: collect files with the Google Drive integration Stripe Checkout: offer more payment methods and collect taxes Gmail integration: send booking emails from your own address New integrations: Zapier and Telegram Apple Pay and Google Pay supported automatically on supported devices and browsers