How it works · App Intents

Every button in the app is also a sentence the system can read.

Next, Not now, Write it down, Stop: each is written once as an App Intent. Siri, Shortcuts, the Lock Screen, the watch and the Action button all call the same one. That is the design, and we think it is where apps are going.

The idea

An App Intent is an action with a name, inputs and a description.

From screens to actions

An app you can only touch is an app only your thumb can use.

AN APP THAT IS ONLY A SCREENYouScreenAppSiriA shortcutA modelnothing to call, so nothing to askAN APP THAT DECLARES ACTIONSYouSiriA shortcutA modelActionsAppone list, with names and typed inputs
On the left, a screen is the only way in. On the right, the app publishes what it can do, and every caller shares the list.
One action, many places

Next Step is written once and shows up in seven.

The same few lines sit behind all of these. Fix one and you have fixed them all.

Next Stepwritten onceSiri“Next step in Routine Run”Shortcutsa block in your own automationControl Centreone tile, the app stays shutLock Screen cardthe Next buttonDynamic Islandthe Next buttonApple WatchDouble Tap, or a phraseAnother app’s alertiOS 27, through Shortcuts
Next Step, from the phone, the wrist, the Lock Screen and another app.
Why we think this is the future

Five reasons, and none of them is about Siri.

The caller keeps changing, the action does not

First a thumb, then a voice, then a shortcut, now a model. An app built on actions works with each new caller on the day it exists. An app built on screens has to be rebuilt for every one.

Small actions compose

Shortcuts is a way to chain actions that were never planned together. We have seen it: a loop that reads a value, adds one and sends the run back, and an on-call chain where a push from PagerDuty starts a run. We ran that one end to end on a phone on 22 September 2026. It needs iOS 27, and it works because every step is an action, not a screen.

Names and types are readable by models

A model cannot press a button it cannot see. It can read a list of actions with names, inputs and descriptions, so we write those for a reader that is not us. The same actions are what the Ask shortcut hands a model’s answer to, whichever model you pick.

The system carries the plumbing

Permissions, background running, the Lock Screen, the watch and the phrase matching are the system’s job. We ask for no account, and the work happens on your phone, inside the app.

It rewards small, honest actions

An action that does one thing is easy to describe, easy to undo and hard to misuse by accident. A vague action is a risk when a model can call it. So every change Siri makes keeps the earlier version.

What is not claimedWhere Apple takes Siri is Apple’s to decide. What is true today is that actions already reach Siri, Spotlight, the Action button, Control Centre, Focus, the Lock Screen and the watch. On iOS 27 Siri picks an app’s action by itself only when it fits a shape Apple defines, and a routine does not yet. Read what Siri does not do yet.
What building on it taught us

Six things the documentation does not say.

Ten phrases is a budget

Apple allows an app ten. We spent them like money: “Open Routine Run” went because the icon already does it, Snooze went because it is a button on the card it answers, and Current Step went because In Hand says the step and a button on it.

A button needs the right kind of intent

Pressed on a Live Activity as a plain App Intent, Next ran in the widget extension, found no run and did nothing. The fix is a Live Activity intent, which runs inside the app, and every action a card can press is one.

Say nothing when the press worked

Shortcuts draws any dialog as a sheet with a Done button. A hardware button that answered with a sentence put a card over whatever you were looking at to say it had worked. The Action button’s intent says nothing.

Do not ask for a face

Five of our actions once required Face ID. It read well and was wrong. Next from a locked phone, a loop in Shortcuts and a card at 2am are the reasons the actions exist. What is undoable is not asked about. Every action here is open.

Write at once, keep the old one

Said to Siri, a change to a routine is saved straight away, because nobody is looking at a page. Every one stores the earlier version first, and Undo Change to a Routine puts it back.

The phone caches the list

Shortcuts remembers an app’s actions by build number. A new action does not appear on a device until the build number changes, which cost us a few confusing afternoons.

Try it

Two minutes, no setup.

  1. 1
    Open Shortcuts and tap Routine Run.

    Every action the app has is listed, with its description. There are more than fifty.

  2. 2
    Build a shortcut from two of them.

    Try Next Step followed by Write It Down. You have composed something the app never planned.

  3. 3
    Run it from the Action button, a widget or Siri.

    Add it to the Home Screen, bind it in Settings → Action Button, or say its name. Same action, new caller.

Hear it first.

Every phrase Siri knows in Routine Run, and a morning that uses them.

See the Siri page

Every action, with what it does, is in Siri and Shortcuts. What leaves the phone is on Privacy.