iOS 27 and the New Apple Intelligence: What Siri, Spotlight, and PCC Mean for Noxidox

With iOS 27, Apple has taken a major step toward integrating artificial intelligence into its operating system. The previous Apple Intelligence is evolving into a system-wide AI layer: Siri can understand personal context, Spotlight search is becoming smarter, and developers are gaining new ways to connect their own apps directly to Apple Intelligence.

This development is particularly interesting for my Noxidox app. That’s because Noxidox is based on a similar core concept: using artificial intelligence to make documents searchable and understandable—directly on the device and without personal documents ever reaching a third-party server.

But iOS 27 not only brings new possibilities—it also raises an important question:

To what extent can an app like Noxidox integrate Siri and Apple Intelligence without compromising its promise of fully local processing?

A New Generation of Siri

The most talked-about feature in iOS 27 is the completely redesigned version of Siri.

Siri AI is now more than just a voice assistant for individual commands. Apple describes the new Siri as significantly more context-aware and conversation-oriented. For example, it can take into account the content of the current screen (On-Screen Awareness), incorporate personal information (Personal Context) from various apps, and perform tasks across multiple apps (Cross-App Actions).

It can also answer general questions and search the web. Siri now has its own interface for longer conversations.

Of particular interest to developers is the integration with App Intents.

With App Intents, apps can make their content and features available in iOS in a way that Apple Intelligence and Siri can understand. The user then doesn’t necessarily have to use a predefined voice command. Instead, Siri can determine which app feature is relevant based on the meaning of a request. This opens up interesting possibilities for a document app.

A request such as “Find the information about the project budget in my Noxidox documents.” could, in the future, lead directly to a Noxidox search.

Spotlight Is Becoming More Than Just a File Search

Spotlight search has also evolved.

With the new App Intents and Spotlight interfaces, Apple is providing developers with ways to make an app’s content discoverable system-wide. Data from apps can also be included in the Spotlight index and can then be found based on its semantic meaning.

This is, of course, exciting for Noxidox as well.

For example, documents, projects, or other content could be passed to the system as structured data. Spotlight can then find this content and, upon a match, directly open Noxidox or navigate to a specific document. Apple goes even a step further: The new Foundation Models Framework includes a Spotlight-based search tool that can also be used to implement local RAG scenarios. Apple explicitly describes this as a way to implement Retrieval-Augmented Generation using local data.

The concept behind Noxidox and Apple’s new architecture are thus increasingly moving in the same direction: local data → semantic search → local language model → comprehensible response

What Is Private Cloud Compute?

Another key component of the new Apple Intelligence Architecture is Private Cloud Compute (PCC).

At first glance, the name seems somewhat contradictory: If something is processed in the cloud, how can it still be “private”?

Apple’s answer is that it combines two different levels of processing. Simple or suitable tasks can be processed directly on the device. For more complex queries, however, the Private Cloud Compute Framework allows access to larger models on the internet.

PCC is not, however, simply a standard cloud AI service.

The Apple architecture sends an encrypted request to specially secured Apple Silicon servers. The data is intended to be used there solely for processing the specific request and then deleted. Apple itself is not supposed to have access to the processed personal data. The technical implementation can also be reviewed by independent security experts.

This, however, highlights an important distinction: Apple Intelligence is privacy-oriented—but not necessarily exclusively on-device.

As a developer, though, I can control this precisely, which is crucial for Noxidox.

Why isn’t Siri AI initially available on the iPhone in the EU?

With the release of iOS 27 on September 14, 2026, there is an important limitation for users in the EU.

Siri AI will not initially be available on the iPhone and iPad in the EU. However, Siri AI can be used on Mac and Apple Vision Pro in the EU.

Apple cites the European Digital Markets Act (DMA) as the reason for this. According to Apple, the DMA requires, among other things, that certain features and capabilities that Apple has implemented in its own services must also be made available to third-party providers. Apple argues that, in the case of Siri AI, this raises significant privacy and security concerns, particularly due to access to personal data and the ability to control other apps.

The European Commission, however, presents this situation differently: It considers Apple’s claim that opening up the system would lead to security or privacy deficiencies to be incorrect. The Commission argues that Apple should be technically capable of ensuring both legal compliance and cybersecurity at the same time.

In this regard, this restriction cannot be simplistically portrayed as “the EU is banning Siri AI.” In fact, the issue involves the regulatory requirements of the DMA, Apple’s technical and security-related objections, and the fact that a suitable solution has not yet been found.

For users, this simply means, for now: The new Siri AI is not yet available on the iPhone in the EU.

For me as a developer, the situation is unfortunately problematic. On the one hand, I think the DMA’s idea—that my software should be able to utilize the system’s full technical capabilities—is a good one. However, in this situation, I am also unable to test the new Siri AI features for the time being.

Siri Integration and the “On-Device” Promise

Noxidox’s most important principle isn’t simply “use Apple Intelligence.”

It is: The user’s documents should remain on their device.

That’s why Siri integration wouldn’t automatically make sense for Noxidox just because Apple offers the necessary APIs.

If Siri processes a request via Noxidox, it must first be clarified which parts of the processing take place locally and when Apple Intelligence relies on Private Cloud Compute.

Technically, two completely different scenarios are conceivable.

Scenario 1: Local Processing

Siri interprets the request locally. For example, Noxidox receives a defined app intent such as “Search my documents.” The actual search then takes place entirely within Noxidox. The existing local retrieval stack finds the relevant text passages, and the on-device model generates the response from them. This would be fully compatible with Noxidox’s current data protection concept.

Scenario 2: Processing via Apple Intelligence / PCC

Siri or a downstream Apple Intelligence process requires a more powerful model to handle the request and uses Private Cloud Compute (PCC). Apple also promises a very high standard of data protection for PCC. The data is not to be permanently stored or made accessible to Apple. For Noxidox, this would weaken the data protection promise compared to fully local processing. This is because PCC is private cloud processing and not on-device processing. Given Noxidox’s data protection promise that no document data leaves the device, any future Siri integration must therefore be designed accordingly and technically restricted.

Noxidox Remains On-Device

This is my guiding principle for the further development of Noxidox. The new Apple APIs make Siri integration very attractive in principle. At the same time, Noxidox should not sacrifice its core feature for the sake of the deepest possible system integration.

Instead, an architecture in which Siri serves merely as an entry point is of interest: Siri → App Intent → Noxidox → local search → local Apple Foundation Model → response

The actual document repository and AI processing remain within Noxidox. Apple provides the appropriate tools for this with the Foundation Models Framework. The framework enables direct access to the Apple Foundation Model on the device and also offers tools for multimodal inputs and local retrieval scenarios.

This aligns very well with Noxidox’s existing technical direction.

And what will happen with the EU?

For users in Germany and other EU countries, the situation remains somewhat unclear for the time being.

According to Apple, the company is working on a way to offer Siri AI on iPhones and iPads in the EU as well. However, there is currently no specific timeline. For Noxidox, this means that Siri integration is already a relevant area of development from a technical standpoint and is planned. However, its actual use on European iPhones currently also depends on Apple’s further implementation of Siri AI in the EU.

An Interesting Development for Local AI

Perhaps the most exciting development in iOS 27, in my opinion:

Apple is increasingly moving toward an architecture that integrates on-device AI, local data, semantic search, and system-wide AI.

This exact combination is also what powers Noxidox.

Noxidox takes a slightly different approach: The goal isn’t to make the entire device smarter, but rather to make your own documents smarter.

PDFs, DOCX, and TXT files are processed locally, semantically indexed, and made searchable using the RAG Engine. Apple Intelligence provides the local language intelligence, while Noxidox controls the documents and the retrieval layer. The iOS 27 operating system now shows that Apple is increasingly integrating precisely these kinds of local AI architectures into the operating system.

For me, this means one thing above all: The idea of private, local AI for personal documents isn’t fading—it’s increasingly becoming an integral part of the platform itself.

The next steps in development will therefore not only involve making Noxidox smarter. They will also involve connecting Noxidox ever more seamlessly with Apple’s local intelligence and search features—without losing sight of the app’s most important promise:

Your documents remain your documents.