Broaden your reach with Siri Event Suggestions

Description: Whether you’re hosting event information in your app, on the web, or in an email, Siri Event Suggestions can help people keep track of their commitments — without compromising their privacy. We’ll show you how to set up your reservations so that they automatically show up in the Calendar app and how to work with the Siri Event Suggestions APIs for iOS and Markup for web and email.

  • Siri Event Suggestions are now also on macOS Big Sur and on the simulator

What is Siri Event Suggestions?

  • Makes it easy to get your event from your app into Calendar
  • The system uses on-device intelligence to streamline everyday interactions with your events:
    • on the lock screen, Siri can notify you when it's time to leave for a restaurant reservation, based on local traffic conditions.
    • on Maps, you get a Siri Suggestion, making getting directions to the airport to catch a flight is as easy as just one tap.
    • Siri can also proactively suggest turning on Do Not Disturb, so you can stay focused on what matters, like the movie you're about to watch.
    • Siri can even provide a suggestion to check-in for your flight right on your lock screen.

New categories and platforms


  • Restaurants booking
  • Car rentals
  • Train
  • Movies
  • Lodging
  • Ticketed Events
  • Flights


  • Bus
  • Boat

New ways to donate events

Beside apps you can now donate events with and
to do you need to embed the event web markup within the HTML of your website or emails.

  • leverages a web standard called
  • supports both JSON-LD and Microdata

JSON-LD example:

<script type="application/ld+json">
  "@context": "",
  "@type": "FoodEstablishmentReservation",
  "reservationStatus": "",
  "reservationId": "IWDSCA",
  "partySize": "2",
  "reservationFor": {
    "@type": "FoodEstablishment",
    "name": "EPIC Steak",
    "startDate": "2020-06-26T19:30:00-07:00",
    "telephone": "(415)369-9955"
    "address": {
      "@type": "",
      "streetAddress": "369 The Embarcadero",
      "addressLocality": "San Francisco"
      "addressRegion": "CA",
      "postalCode": "95105",
      "addressCountry": "USA"

Microdata example:

<div itemscope itemtype="FoodEstablishmentReservation"> 
  <link itemprop="reservationStatus" href=""/>
  <meta itemprop="reservationId" content="IWDSCA"/>
  <meta itemprop="partySize" content="2"/>
  <div itemprop="reservationFor" itemscope itemtype="FoodEstablishment">
    <meta itemprop="name" content="EPIC Steak"/>
    <meta itemprop="startDate" content="2020-06-26T19:30:00-07:00"/>
    <meta itemprop="telephone" content="(415)369-9955"/>
    <div itemprop="address" itemscope itemtype="PostalAddress">
      <meta itemprop="streetAddress" content="369 The Embarcadero"/>
      <meta itemprop="addressLocality" content="San Francisco"/>
      <meta itemprop="addressRegion" content="CA"/>
      <meta itemprop="postalCode" content="95105"/>
      <meta itemprop="addressCountry" content="USA"/>
  • As long as the reservation identifier stays the same, we can use the same markup format to update the event as well.
  • If the event gets canceled, update the reservationStatus to


  • you must register your domain at where you can submit your domain and samples of your markup.
  • your website must use HTTPS, and that your emails have a valid DKIM signature.


To enable your domain for testing, either:

  • open the Developer Settings and enable Allow Any Domain on iOS
  • use the command below on the Mac:

defaults write SuggestionsAllowAnyDomainForMarkup -bool true

To enable local testing, either:

  • open the Developer Settings and enable Allow Unverified Sources
  • use the command below on the Mac:

defaults write SuggestionsAllowUnverifiedSourceForMarkup -bool true


  • Use appropriate reservationStatus
  • Use ISO8601 format for dates and time
  • Keep reservationId consistent for updates and canceled reservations

Donations overview

  • To donate to Siri, the app first maps its reservation details into INReservation objects.
  • INReservation contains the details about the reservation shown in the app.
  • The INReservation objects are added to an intent response that, together with the intent, forms the interaction, INInteraction, that the app donates to Siri.
  • Once donated, Siri may create one or more Calendar events and notify the user that the reservations were added to their Siri Event Suggestions Calendar.
  • To get more details, or to manage the reservation, we want people to easily get back into your app, so we put a "Show in App" button right in Calendar to make this easy.
  • When the "Show in App" button is pressed, the system will construct an INGetReservationDetailsIntent containing information about the reservation the user wants to view.
  • This INGetReservationDetailsIntent uses the container and item reference from the donation that was used to create the event.
  • A reservation may consist of one or more parts. For example, in a flight reservation with multiple legs, each leg is one part of the reservation and must be represented as an individual INReservation object with a unique item reference.
  • You can choose any identifier you'd like, as long as it's unique and it enables you to find a specific part of the reservation to show when being launched
  • if the booking consists of one part only, like a dinner, you can use the reservation number as item reference
  • if the booking consists of multiple parts, like a round-trip flight, each flight/leg needs to have its own unique item reference (for example the ticket number)
  • if the app is not installed on a device, instead of the "Show in App" button there will be a "Show in Safari" button: pressing this will open the URL you set in Safari, so the user can view their reservation details on your website.
  • Make sure you adopt this new URL property, since calendar events will be synced to all the users' devices, some of which may not have your app installed.

Debugging Donations

When your app/website/email donates reservation details, they may be processed asynchronously by different parts of the system: it's not always possible to let your app know if something went wrong.

To help you debug issues during development, you can view donation logs in the (needs Big Sur):

  • select the device you're debuggin
  • filter by siri-event-suggestions category
  • donate again

Missing anything? Corrections? Contributions are welcome 😃


Written by

Federico Zanetello

Federico Zanetello

Software engineer with a strong passion for well-written code, thought-out composable architectures, automation, tests, and more.