The common impression is that Siri does not compare with Alexa and Google Voice. Siri seems stuck in the past compared to its rivals. Voice assistants are OK for general information like Wikipedia or weather or sports, but they lag when it comes to personal information.

WWDC 2018 changes all that.


25 Extensions and Counting

Every year Apple comes up with new ways for apps to integrate themselves within the operating system. There are now 25 different extensions you can add to an app to keep it from getting marooned on the home screen, ranging from Spotlight search to Apple Watch extensions to messages.

Over the last couple of years, Apple has gradually opened up Siri to developers. At first, the list of voice intents was quite restrictive. Now apps can generate custom intents to handle just about any kind of user interaction.

Adding extensions

A Problem Never Solved Well by Notifications

The enterprise tries to send useful information via notifications, but most notifications get ignored. Indeed, app retention has been shown to be inversely proportional to the number of notifications sent.

Siri shortcuts act like a personal notification server for the user. Siri shortcuts happen when the user initiates actions that are likely to be repeated. Compared to that, remote notifications seem more like mere guesses.

Given the location, time, and day of the week, that user initiates an action, Siri can suggest an action at a time that makes sense.

Even better, the user can record customized phrases to trigger the Siri shortcuts on demand. These shortcuts can then be combined with other shortcuts to make a chain of events happen. What's great about this is all actions are under user control and local to the device.

Non-Profit Siri

Siri integration spawned a new term, donation. When the user engages in an activity that the user might want to repeat with Siri, the app needs to donate it to Siri. Seems like a strange verb, but here's what the code looks like:


Sample App: SiriBanker

You will find our sample app on GitHub. We did all our work on the first beta of iOS 12. Not everything worked for us as expected. If you aren't interested in the code, just skip to our conclusions.

We call our app SiriBanker. The goal is to build a simple banking app that can display information about multiple accounts. There is nothing fancy here, not even authentication. The user can view transactions and make transfers.

We wanted to see how far we could push Siri to:

  • View account information
  • Make transfers

There are two ways to integrate with Siri, via INIntent and NSUserActivity. Intents allow the user to perform actions without opening the app. User Activity navigates the user to a particular place in the app.


To set up intents, here are a couple of things to get you started.

1. Turn on debug mode for Siri

If you don't do this, you may have to wait a long time to see any Siri suggestions. In Settings/Developer, eliminate the wait for suggestions to show up by toggling "Display Recent Shortcuts" and "Display Notifications on Lock Screen"

Debug Shortcuts

2. Move your business logic to a framework

Users should be able to interact with your app's features without interacting with your app. This means all your business logic needs to be segregated into its own framework, a framework that both the app and the extension depend upon.

Code Generation Location

For our app SiriBanker:

  • SiriBankerKit contains all business logic.
  • SiriBankerIntent gets called when to handle shortcuts
  • SiriBankerIntentUI manages display of data after the user taps on the Siri shortcut.

3. Enable Siri Capability and App Groups

App Groups will be new for customers unaccustomed to sharing data across extensions and app. Both the SiriBanker and the SiriBankerIntent targets will need an entitlement file that shares the same App Group.

App group

4. Study Soup Kit

Apple provides a great sample app to get started, Soup Chef. You can download it here.

5. Create a custom Intent.

Create a custom intent using the new intent editor.

Custom Intent

This editor actually generates code that appears in your build directory.

Siri shortcuts generated code

Compared to other generated code we've seen, the output isn't half bad.

You can also create system intents using the intent definition file, but we could never get it to work. We kept getting a 'missing intent title' error each time we tried to donate the intent. If you figure it out, send us PR!

Siri shortcuts intent tile empty

User Activity

One new feature is suggested activities via Siri Shortcuts. These shortcuts are presented to the user at a time the system considers to be relevant, or when the user searches for a keyword in spotlight search.

In our banking app, we created a shortcut for accessing a user's checking account. When the user completes the action normally by visiting their Checking Account Details view, the app creates an NSUserActivity which defines the action and donates it to the system. Donations like these are tracked internally on the device and used to suggest the shortcut to the user at an appropriate time. For example, if a customer of your bank is constantly revisiting their checking account balance at noon every other Friday, Siri and the system will learn this behavior and suggest the action to the user on subsequent Fridays via the lock screen.

Alternatively, if the user searches in spotlight for the phrase or keywords associated with the NSUserActivity, a suggestion will appear in the search results that will navigate the user to the appropriate screen. A screenshot of this functionality is below.

Checking Spotlight Suggestions

You will have to implement the AppDelegate function application(_ application: continue userActivity: restorationHandler: ) -> Bool to handle the user selecting those shortcuts.

Conclusion and Recommendations

In the end, during our short excursion into the world of Siri Shortcuts, we found that UserActivities and Custom Intents worked as expected, but we were unable to get the system defined intents working.

This may have been our error, or it may be too early in the Xcode Beta release process to expect everything functional. Either way, you are welcome to check out our repository on GitHub and explore the project yourself.

Feel free to create a PR if you have any suggested improvements.

Siri Shortcuts is Apple's response to the gap that has existed between both Google's voice assistant and Alexa.

The feature is designed to leverage machine learning to make Siri more intelligent and puts the control into the hands of the enterprise.

Rather than simply responding to the commands built in, with programmable custom intents and userActivities, developers can allow Siri to respond to custom voice commands and intelligently suggest actions within your application.

This furthers Apple's vision for a design-oriented experience around their devices. It's clear that Apple wants your app to be much more than just an icon on the home screen. Apps now should strive to be seamlessly woven into the device experience. Doing this prevents your app from being 'lost in the shuffle,' or forgotten on the home screen. Some apps in distribution today attempt to leverage local and remote notifications to 'remind' the user to open the app in an un-intrusive way.

With Siri Shortcuts, reminders to your users can feel more appropriate and more eloquent.

The best part is, you can begin implementing this functionality today, using @available(iOS 12.0, watchOS 5.0, *) tags to avoid disrupting the experience for users who are slow to upgrade.

The good news is that most users will upgrade: based on historical data, by Christmas 2018, enterprises can expect that 70% of their customers will be running iOS 12. A year from now, that percentage will be close to 90%. Building for this experience now will put an enterprise ahead of the curve and can create an experience that edges out other apps in your space.