Add to Calendar Button vs AnnoVisio

Make your events get saved. This WordPress plugin lets you create beautiful buttons with calendar links, where people can add events to their calendars. All of this with just a few clicks and highly customizable, using the popular Add to Calendar Button script. Check out the official website for a comprehensive demo and overview. 🛠️ INTEGRATED IN SECONDS You can either use the shortcode [add-to-calendar-button] or the Gutenberg Block. With the PRO version, it only takes the ID to make it fly. In the no-PRO case, you simply place the necessary attributes directly in the shortcode, or at the Gutenberg Block settings. (Mind that you cannot use ‘[‘ and ‘]’ characters, when going for the shortcode option! For content formatting, you can use {‘{‘}xxx{‘}’} instead of [xxx] there.) 🚀 GO PRO Go even further with the PRO version… → Manage all details and styling via a convenient web app. → Use the same button to let people RSVP to your events – fully managed. → Get auto-generated landing pages and shareable links for your events. → Have better guidance for your users, when they add events to their calendars and things don’t go as expected. 👉 Learn more at add-to-calendar-pro.com. ✨ SUPPORTED CALENDARS Google Calendar. Yahoo Calender. Microsoft 365, Outlook, and Teams. Automatically generated iCal/ics files (for all other calendars, like Apple). 📆 SUPPORTED EVENT TYPES Timed and all-day events. One-time, multi-date, recurring. Most robust time zone and daylight saving management. Dynamic dates (like “today + 3”). 🎨 ADJUST THE LOOK The button comes with multiple themes as well as a dark and light mode. You can easily adjust almost every element by setting the respective simple attributes. In case you want to go all-in, you can also manipulate all kinds of colors and further styling. 🖖 EXPERT ACCESSIBILITY Optimized and adjustable UX (for desktop and mobile). Dynamic dropdown positioning. Taking care of all those edge cases, where some scenarios do not support specific setups (like WebView blocking downloads); utilizing beautiful user guidance workarounds. Auto-generated Schema.org rich (structured) data for better SEO. Full support for mouse, touch, or keyboard input (W3C WAI compliant). Aside from the WordPress editor, the button itself supports 20+ languages, incl. RTL text for Arabic; but also offers the option to customize all labels and text blocks. 📄 ABOUT THE LICENSE Mind that the script to actually generate the Add to Calendar Button uses the Elastic License 2.0 (ELv2)! This usually comes with no restrictions for you, but it forbids you to rework the core script and provide the product (generating an add-to-calendar-button) to others as a managed service. In almost every case, this will not affect you. If you are not sure, because you are building some kind of SaaS, where you are using the plugin, simply contact us.

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