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Siri

Product

Fact-checked Oct 27, 2026

Also called: Apple Siri

Siri is Apple's virtual assistant, a voice-controlled AI that helps users perform tasks, answer questions, and control their devices.

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What is Siri?

Siri is a well-known virtual assistant developed by Apple, first introduced with the iPhone 4S in 2011. It uses natural language processing, a branch of AI that helps computers understand and respond to human language, to interpret voice commands and perform a wide range of tasks. You can ask Siri to send messages, make calls, set alarms, check the weather, play music, or even give you directions.

The technology behind Siri involves several AI components. When you speak to Siri, your voice is converted into text. This text is then analyzed to understand your intent, like whether you want to set a timer or find a restaurant. Siri then accesses various online services and local data on your device to fulfill your request, speaking back the answer or performing the action.

Over the years, Siri has evolved to integrate more deeply with Apple's ecosystem of devices and services. It's available across iPhones, iPads, Apple Watches, HomePods, and Macs, providing a consistent user experience. While it was one of the first widely adopted voice assistants, its capabilities have been continuously updated, and it remains a popular way for many users to interact with their devices hands-free.

One common misconception is that Siri is a single, massive AI model. In reality, it's a complex system that combines many smaller AI models and traditional software components, each specializing in different parts of the interaction, like speech recognition, natural language understanding, and task execution. This modular approach allows for continuous improvement and integration of new features.

Common questions

What is Siri used for?

Siri is a well-known virtual assistant developed by Apple, first introduced with the iPhone 4S in 2011. It uses natural language processing, a branch of AI that helps computers understand and respond to human language, to interpret voice commands and perform a wide range of tasks. You can ask Siri to send messages, make calls, set alarms, check the weather, play music, or even give you directions.

What else is Siri called?

Siri is also referred to as Apple Siri.

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