Both Google and Apple are cramming new AI features into their phones and other devices, and neither company has offered clear ways to control which apps those AI systems can access. Recent issues around WhatsApp on both Android and iPhone demonstrate how these interactions can go sideways, risking revealing chat conversations beyond what you intend. Users deserve better controls and clearer documentation around what these AI features can access.

After diving into how Google Gemini and Apple Intelligence (and in some cases Siri) currently work, we didn’t always find clear answers to questions about how data is stored, who has access, and what it can be used for.

At a high level, when you compose a message with these tools, the companies can usually see the contents of those messages and receive at least a temporary copy of the text on their servers.

When receiving messages, things get trickier. When you use an AI like Gemini or a feature like Apple Intelligence to summarize or read notifications, we believe companies should be doing that content processing on-device. But poor documentation and weak guardrails create issues that have lead us deep into documentation rabbit holes and still fail to clarify the privacy practices as clearly as we’d like.

We’ll dig into the specifics below as well as potential solutions we’d like to see Apple, Google, and other device-makers implement, but first things first, here’s what you can do right now to control access:

Control AI Access to Secure Chat on Android and iOS

Here are some steps you can take to control access if you want nothing to do with the device-level AI features' integration and don’t want to risk accidentally sharing the text of a message outside of the app you’re using.

How to Check and Limit What Gemini Can Access

If you’re using Gemini on your Android phone, it’s a good time to review your settings to ensure things are set up how you want. Here’s how to check each of the relevant settings:

• Disable Gemini App Activity: Gemini App Activity is a history Google stores of all your interactions with Gemini. It’s enabled by default. To disable it, open Gemini (depending on your phone model, you may or may not even have the Google Gemini app installed. If you don’t have it installed, you don’t really need to worry about any of this). Tap your profile picture > Gemini Apps Activity, then change the toggle to either “Turn off,” or “Turn off and delete activity” if you want to delete previous conversations. If the option reads “Turn on,” then Gemini Apps Activity is already turned off. 
• Control app and notification access: You can control which apps Gemini can access by tapping your profile picture > Apps, then scrolling down and disabling the toggle next to any apps you do not want Gemini to access. If you do not want Gemini to potentially access the content that appears in notifications, open the Settings app and revoke notification access from the Google app.
• Delete the Gemini app: Depending on your phone model, you might be able to delete the Gemini app and revert to using Google Assistant instead. You can do so by long-pressing the Gemini app and selecting the option to delete. 

How to Check and Limit what Apple Intelligence and Siri Can Access

Similarly, there are a few things you can do to clamp down on what Apple Intelligence and Siri can do: 

• Disable the “Use with Siri Requests” option: If you want to continue using Siri, but don’t want to accidentally use it to send messages through secure messaging apps, like WhatsApp, then you can disable that feature by opening Settings > Apps > [app name], and disabling “Use with Siri Requests,” which turns off the ability to compose messages with Siri and send them through that app.
• Disable Apple Intelligence entirely: Apple Intelligence is an all-or-nothing setting on iPhones, so if you want to avoid any potential issues your only option is to turn it off completely. To do so, open Settings > Apple Intelligence & Siri, and disable “Apple Intelligence” (you will only see this option if your device supports Apple Intelligence, if it doesn’t, the menu will only be for “Siri”). You can also disable certain features, like “writing tools,” using Screen Time restrictions. Siri can’t be universally turned off in the same way, though you can turn off the options under “Talk to Siri” to make it so you can’t speak to it. 

For more information about cutting off AI access at different levels in other apps, this Consumer Reports article covers other platforms and services.

Why It Matters 

Sending Messages Has Different Privacy Concerns than Receiving Them

Let’s start with a look at how Google and Apple integrate their AI systems into message composition, using WhatsApp as an example.

Google Gemini and WhatsApp

On Android, you can optionally link WhatsApp and Gemini together so you can then initiate various actions for sending messages from the Gemini app, like “Call Mom on WhatsApp” or “Text Jason on WhatsApp that we need to cancel our secret meeting, but make it a haiku.” This feature raised red flags for users concerned about privacy.

By default, everything you do in Gemini is stored in the “Gemini Apps Activity,” where messages are stored forever, subject to human review, and are used to train Google’s products. So, unless you change it, when you use Gemini to compose and send a message in WhatsApp then the message you composed is visible to Google.

If you turn the activity off, interactions are still stored for 72 hours. Google’s documentation claims that even though messages are stored, those conversations aren't reviewed or used to improve Google machine learning technologies, though that appears to be an internal policy choice with no technical limits preventing Google from accessing those messages.

By default, everything you do in Gemini is stored in the “Gemini Apps Activity,” where messages are stored forever, subject to human review, and are used to train Google’s products.

The simplicity of invoking Gemini to compose and send a message may lead to a false sense of privacy. Notably, other secure messaging apps, like Signal, do not offer this Gemini integration.

For comparison’s sake, let’s see how this works with Apple devices.

Siri and WhatsApp

The closest comparison to this process on iOS is to use Siri, which it is claimed, will eventually be a part of Apple Intelligence. Currently, Apple’s AI message composition tools are not available for third-party apps like Signal and WhatsApp.

According to its privacy policy, when you dictate a message through Siri to send to WhatsApp (or anywhere else), the message, including metadata like the recipient phone number and other identifiers, is sent to Apple’s servers. This was confirmed by researchers to include the text of messages sent to WhatsApp. When you use Siri to compose a WhatsApp message, the message gets routed to both Apple and WhatsApp. Apple claims it does not store this transcript unless you’ve opted into “Improve Siri and Dictation.” WhatsApp defers to Apple’s support for data handling concerns. This is similar to how Google handles speech-to-text prompts.

In response to that research, Apple said this was expected behavior with an app that uses SiriKit—the extension that allows third-party apps to integrate with Siri—like WhatsApp does.

Both Siri and Apple Intelligence can sometimes run locally on-device, and other times need to rely on Apple-managed cloud servers to complete requests. Apple Intelligence can use the company’s Private Cloud Compute, but Siri doesn’t have a similar feature.

The ambiguity around where data goes makes it overly difficult to decide on whether you are comfortable with the sort of privacy trade-off that using features like Siri or Apple Intelligence might entail.

How Receiving Messages Works

Sending encrypted messages is just one half of the privacy puzzle. What happens on the receiving end matters too. 

Google Gemini

By default, the Gemini app doesn’t have access to the text inside secure messaging apps or to notifications. But you can grant access to notifications using the Utilities app. Utilities can read, summarize, and reply to notifications, including in WhatsApp and Signal (it can also read notifications in headphones).

This could open up any notifications routed through the Utilities app to the Gemini app to access internally or from third-parties.

We could not find anything in Google’s Utilities documentation that clarifies what information is collected, stored, or sent to Google from these notifications. When we reached out to Google, the company responded that it “builds technical data protections that safeguard user data, uses data responsibly, and provides users with tools to control their Gemini experience.” Which means Google has no technical limitation around accessing the text from notifications if you’ve enabled the feature in the Utilities app. This could open up any notifications routed through the Utilities app to the Gemini app to be accessed internally or from third-parties. Google needs to publicly make its data handling explicit in its documentation.

If you use encrypted communications apps and have granted access to notifications, then it is worth considering disabling that feature or controlling what’s visible in your notifications on an app-level.

Apple Intelligence

Apple is more clear about how it handles this sort of notification access.

Siri can read and reply to messages with the “Announce Notifications” feature. With this enabled, Siri can read notifications out loud on select headphones or via CarPlay. In a press release, Apple states, “When a user talks or types to Siri, their request is processed on device whenever possible. For example, when a user asks Siri to read unread messages… the processing is done on the user’s device. The contents of the messages aren’t transmitted to Apple servers, because that isn’t necessary to fulfill the request.”

Apple Intelligence can summarize notifications from any app that you’ve enabled notifications on. Apple is clear that these summaries are generated on your device, “when Apple Intelligence provides you with preview summaries of your emails, messages, and notifications, these summaries are generated by on-device models.” This means there should be no risk that the text of notifications from apps like WhatsApp or Signal get sent to Apple’s servers just to summarize them.

New AI Features Must Come With Strong User Controls

As more device-makers cram AI features into their devices, the more necessary it is for us to have clear and simple controls over what personal data these features can access on our devices. If users do not have control over when a text leaves a device for any sort of AI processing—whether that’s to a “private” cloud or not—it erodes our privacy and potentially threatens the foundations of end-to-end encrypted communications.

Per-app AI Permissions

Google, Apple, and other device makers should add a device-level AI permission, just like they do for other potentially invasive privacy features, like location sharing, to their phones. You should be able to tell the operating system’s AI to not access an app, even if that comes at the “cost” of missing out on some features. The setting should be straightforward and easy to understand in ways the Gemini an Apple Intelligence controls currently are not.

Offer On-Device-Only Modes

Device-makers should offer an “on-device only” mode for those interested in using some features without having to try to figure out what happens on device or on the cloud. Samsung offers this, and both Google and Apple would benefit from a similar option.

Improve Documentation

Both Google and Apple should improve their documentation about how these features interact with various apps. Apple doesn’t seem to clarify notification processing privacy anywhere outside of a press release, and we couldn’t find anything about Google’s Utilities privacy at all. We appreciate tools like Gemini Apps Activity as a way to audit what the company collects, but vague information like “Prompted a Communications query” is only useful if there’s an explanation somewhere about what that means.

The current user options are not enough. It’s clear that the AI features device-makers add come with significant confusion about their privacy implications, and it’s time to push back and demand better controls. The privacy problems introduced alongside new AI features should be taken seriously, and remedies should be offered to both users and developers who want real, transparent safeguards over how a company accesses their private data and communications.