SiriKit Integration & Siri Shortcuts Development
Mossmize is a software development company that adds Siri to iPhone apps — the Swift engineering, the voice UX, and the App Store review work that comes with it. If your users still have to unlock the phone, find your icon, and tap through three screens to do the one thing they do every day, that's the gap Siri integration closes. They say it. Your app does it.
We work with both SiriKit and Apple's newer App Intents framework, and this page explains — plainly — what the work involves, how long it takes, and where most integrations fall apart.
What "Siri integration" actually involves
The term covers two different Apple frameworks, and picking the wrong one is the most common mistake we find in codebases we inherit.
SiriKit is the original framework, released back in 2016. It works through fixed intent domains — messaging, payments, VoIP calls, workouts, media playback, ride booking, lists and notes. If your app fits one of those domains, SiriKit gives you deep system integration at a reasonable cost: Siri handles the language understanding, your intents extension handles the action.
App Intents arrived with iOS 16 in 2022 and is the framework Apple is betting on. Instead of fixed domains, you describe your app's actions in plain Swift — no separate extension target, no .intentdefinition files — and that one definition powers Siri, the Shortcuts app, Spotlight search, interactive widgets, and Live Activities. Since WWDC 2024 it is also the on-ramp to Apple Intelligence: as Siri gets better at understanding what apps can do, App Intents is how your app takes part in that.
The practical answer for most products today: new voice features go in App Intents, and older SiriKit code gets migrated incrementally rather than rewritten in one heroic sprint. We've done both directions, and we'll tell you honestly which one your codebase needs. Sometimes the answer is "leave the SiriKit messaging intent alone — it works."
What we build when we integrate Siri into an iPhone app
Voice actions for the things users repeat. Order again. Check today's bookings. Log a workout. Send the invoice. The right candidates are high-frequency, low-ambiguity actions — we'll help you pick three or four rather than exposing your whole menu, because a voice action nobody remembers the phrase for is dead weight.
Siri Shortcuts with intent donation. Each time a user performs an action in the app, we donate that intent to the system. iOS learns the pattern and starts suggesting it — on the lock screen, in Spotlight, in the Shortcuts app — around the time of day the user actually does it. This is the discovery channel most apps never switch on.
Parameter handling that survives real speech. "Book a table" is easy. "Book a table for six at eight" needs parameter resolution, disambiguation ("Which location?"), and confirmation dialogs that don't feel like a phone tree. Here the voice UX writing matters as much as the Swift.
The same intents, on every surface. One App Intents definition also shows up in Spotlight, widgets, and on Apple Watch — four surfaces for the price of one integration.
Where Siri integrations go wrong
We get called in to fix Siri features more often than to build them from scratch, and the failure modes repeat.
Nobody donated anything.
The intents exist, technically. But the app never donates them after real user actions, so Siri never suggests them and users never learn they exist. Adoption rounds to zero.
The invocation phrase was designed in a meeting.
“Hey Siri, initiate my wellness journey” is not something a human says. We script phrases from how users actually talk — short, imperative, specific — and register alternates, because people will say “order my usual”, “reorder”, and “get my coffee” for the same action.
Parameters dead-end into the app.
If Siri hits an ambiguity it can’t resolve and the answer is “Open the app to continue”, the user learns that voice doesn’t work and never tries again. Careful resolution logic keeps the whole flow in the conversation.
App Review surprises.
Siri features carry their own review expectations — permission strings, privacy disclosures, a working demo path for the reviewer. A rejection here typically costs a week. We prepare the review notes together with the build.
How a SiriKit implementation runs at Mossmize
1. Codebase and candidate audit
We read your Swift codebase, check your minimum iOS version, and shortlist the actions worth exposing to voice. You get a one-page recommendation — SiriKit domain, App Intents, or both — with effort attached. Usually done inside a week.
2. Voice UX script, before any code
We write the conversation as a document you can review: invocation phrases and alternates, parameter prompts, confirmations, error dialogs, what Siri says on success. Changing a sentence at this stage is free. Changing it after implementation isn't.
3. Build and on-device QA
Intents are implemented in Swift against your real business logic, then tested on physical devices — different accents, background noise, locked versus unlocked, AirPods, CarPlay where it applies. Simulator-only Siri testing is how bugs ship.
4. Release and measurement
We instrument invocations so you can see which phrases fire and where flows abandon, prepare the App Store review notes, ship through TestFlight, and iterate on real usage after launch.
How long it takes, and what it costs
A focused integration — two to four voice actions added to an existing Swift app — usually runs three to six weeks end to end, including the voice UX pass, on-device QA, and App Store review preparation. Scope grows with custom App Intents surfaces like widgets and Apple Watch, multi-language phrase support, and any backend work your actions depend on.
On cost: think feature sprint, not rebuild. Siri integration reuses your existing business logic — what you're paying for is the intent layer, the voice UX, and the testing discipline. We scope it precisely after the audit, and the audit itself is quick. You'll know the real number before you commit to anything.
Siri integration questions we get asked
We start by mapping the actions users would want to trigger by voice, then implement them as intents — using SiriKit domains for standard cases like messaging or payments, or the App Intents framework for custom actions. Each intent gets invocation phrases, parameter resolution, confirmation dialogs, and on-device testing before we ship it through TestFlight and App Store review.
SiriKit is Apple's original framework built around fixed intent domains (messaging, payments, workouts, media, bookings). App Intents, introduced in iOS 16, replaces custom intents with a Swift-native framework that powers Siri, Shortcuts, Spotlight, and widgets from one definition — and is the foundation for Apple Intelligence integration. New projects usually target App Intents; existing SiriKit apps can migrate incrementally.
Yes — Siri Shortcuts development is usually an addition to your existing codebase, not a rewrite. We identify your app's highest-value actions, expose them as intents with suggested invocation phrases, and donate them to the system so Siri proactively suggests your app at the right moments. Most existing Swift apps can ship their first shortcuts within a few weeks.
A focused integration — two to four voice actions on an existing app — typically takes 3-6 weeks including voice UX design, development, on-device QA, and App Store review preparation. Larger scopes with custom App Intents, CarPlay or Watch surfaces, and multi-language phrase support run longer. We scope it precisely after auditing your codebase.
Yes. Donated intents make your app appear in Siri Suggestions, Spotlight search, and the Shortcuts app — surfaces users see daily without opening the App Store. Voice-triggered re-engagement also improves retention metrics, and App Intents adoption positions your app for Apple Intelligence features as Apple expands them.