Home / Clinical Decision Support & Reference / Sleep Apnea Notification Feature (SANF)

Sleep Apnea Notification Feature (SANF)

by Apple · Based in United States →

Pulmonology Sleep Medicine

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Overview

The Sleep Apnea Notification Feature (SANF) is a software-only mobile medical application integrated into compatible Apple Watch models (Series 9, Series 10, Ultra 2) running watchOS 11 and the Health app on iPhone. It utilizes the Apple Watch’s accelerometer to monitor small movements associated with interruptions in normal respiratory patterns during sleep, identifying patterns of breathing disturbances. Using advanced machine learning and an algorithm developed with extensive clinical-grade sleep apnea test data, the feature provides notifications to users if consistent signs of moderate to severe sleep apnea are detected over a 30-day period. The notification includes educational materials and a PDF report with three months of historical data, which users can share with their healthcare provider for discussion. The SANF is intended for over-the-counter (OTC) use by adults aged 18 and over who have not previously received a sleep apnea diagnosis. It is not a diagnostic tool and is not intended to diagnose, treat, or aid in the management of sleep apnea. While primarily a consumer-facing tool, the data generated could be relevant for physicians, including anesthesiologists, in pre-operative assessments if shared by the patient.

Reviewed by Pouyan Golshani, MD — Interventional Radiologist

Key Features

Breathing Disturbance monitoring during sleep via Apple Watch accelerometer.
AI/Machine learning algorithm for detecting patterns of moderate to severe sleep apnea.
Notifications for consistent signs of potential sleep apnea risk.
Educational materials provided with notifications.
PDF report of 3 months historical data for discussion with healthcare providers.
Integrated with Apple Health app on iPhone.
Over-the-counter (OTC) use for adults 18+ not previously diagnosed with sleep apnea.
Not intended for diagnosis, treatment, or management of sleep apnea.

Use Cases

Early identification of potential moderate to severe sleep apnea risk in undiagnosed adults.
Facilitating informed conversations between patients and healthcare providers about sleep health.
Personal monitoring of sleep patterns and breathing disturbances over time.
Supporting proactive health management and encouraging medical consultation.
Indirectly, providing patient-generated data for pre-operative assessment by anesthesiologists or other specialists.

What Physicians Need to Know

Evidence Base

The Sleep Apnea Notification Feature (SANF) utilizes an algorithm developed with advanced machine learning and an extensive dataset of clinical-grade sleep apnea tests. It analyzes 'Breathing Disturbance' data collected by the Apple Watch's accelerometer sensor to identify patterns suggestive of moderate to severe sleep apnea.

Clinical Validation Studies

The feature underwent clinical validation, described as 'unprecedented in size for sleep apnea technology,' where every participant identified by the algorithm had at least mild sleep apnea. Apple's clinical testing indicated a 66.6% sensitivity rate for correctly identifying participants with moderate to severe sleep apnea. Other reports suggest 89% accuracy for severe sleep apnea (with 98.5% specificity) and 43% for moderate sleep apnea. The FDA granted 510(k) clearance, approving it as an over-the-counter medical device to notify users of a potential risk for sleep apnea, but not as a diagnostic tool.

Alert Fatigue Management

To manage alert fatigue, the feature provides notifications based on a 30-day analysis. A notification is sent if at least 50% of 10 or more sleep recordings within that period show 'elevated' breathing disturbances. The algorithm remains silent if insufficient data (fewer than 10 nights with data) is collected within the 30-day window.

Clinical Workflow Integration

Users receive a notification of possible sleep apnea and can view nightly 'Breathing Disturbances' in the Health app. For informed discussions with healthcare providers, users can export a PDF report containing three months of breathing disturbance data and additional information. The feature is designed to prompt users to consult their doctor for further evaluation and potential diagnosis.

Physician Tip

The Apple Watch Sleep Apnea Notification Feature (SANF) serves as a valuable screening tool, not a diagnostic one. Physicians should view notifications from this feature as an indicator for further clinical investigation, particularly for moderate to severe sleep apnea, and recommend formal sleep studies (e.g., polysomnography or home sleep apnea tests) for definitive diagnosis. The exported PDF report from the Health app can be a useful starting point for patient discussions. It's crucial to emphasize that the feature is intended for undiagnosed individuals and should not be used for monitoring treatment effectiveness or as a substitute for professional medical advice.

The SANF integrates with the Apple Health app on the iPhone, where users can access detailed 'Breathing Disturbances' data and generate shareable PDF reports. The feature primarily leverages the Apple Watch's accelerometer for data collection. There is no direct integration with Electronic Health Records (EHRs) or other clinical systems; data sharing with healthcare providers is patient-mediated via the generated PDF.

At a glance

Pricing Included with device

Deployment Integrated Software Feature On Apple Watch (watchOS) And IPhone (Health App).

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Details

Category	Clinical Decision Support & Reference, Wearables & Remote Monitoring (RPM)
Pricing	Included with device — Included with compatible Apple Watch models (Series 9, Series 10, Ultra 2) and watchOS 11.
Deployment	Integrated software feature on Apple Watch (watchOS) and iPhone (Health app).
Compliance
BAA Available	Unknown AI-estimated
HIPAA Compliant	Unknown AI-estimated
FDA Status	1 AI-estimated Received FDA 510(k) clearance (K240929) on September 13, 2024, as an over-the-counter (OTC) software-only mobile medical application. It is intended to identify patterns suggestive of moderate-to-severe sleep apnea in adults 18+ not previously diagnosed, but it is not a diagnostic tool.
Integrations
EHR	Not specified
Specialties	Pulmonology, Sleep Medicine

What the Web Says

The Apple Watch's Sleep Apnea Notification Feature (SANF) is an FDA-cleared tool designed to pre-screen for moderate to severe sleep apnea in adults aged 18 and older who have not been previously diagnosed. It utilizes the watch's accelerometer and heart rate sensors to monitor breathing disturbances over multiple nights, providing notifications and actionable reports for clinical consultation. While not a diagnostic tool, it serves as a valuable early warning system to prompt users to seek medical advice.

Overall: Positive

Strengths

FDA-cleared for detecting signs of moderate to severe sleep apnea.
Utilizes accelerometer and heart rate sensors for comprehensive monitoring.
Generates actionable reports for sharing with healthcare providers.
Easy to set up and integrates seamlessly with the Apple Health app.
Can help identify a woefully underdiagnosed and serious medical condition.
Available on Apple Watch Series 9 and later, and Apple Watch Ultra 2.

Limitations

Not a diagnostic tool; it only screens for potential sleep apnea.
Not intended for individuals already diagnosed with sleep apnea.
Battery life can be a constraint for 24/7 wear compared to dedicated sleep rings.
Functionality is limited to users within the Apple ecosystem (iPhone required).
Does not take into account a user's symptoms.
Absence of a notification does not indicate the absence of sleep apnea.

Based on reviews from: MedGrade, Apple (Estimating Breathing Disturbances and Sleep Apnea Risk from Apple Watch), Sleeplay, Apple Health Sleep Tracking Review: Features, Pricing, Privacy and What to Verify, Apple Watch Gets Sleep Apnea Detection Feature, Apple Watch and Better Sleep Health, Apple introduces groundbreaking health features, Reddit (r/SleepApnea), Apple Watch's Role in Detecting Sleep Apnea, Pocket-lint, G2 Computers, Can Your Apple Watch Detect Sleep Apnea?, Business Insider, AppleInsider, Target, Apple Watch Ultra 2 - Tech Specs

Last updated: 2026-07-20

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Press & Coverage

Apple Newsroom

Apple introduces groundbreaking health features to support conditions impacting billions of people

Apple announced new health features, including sleep apnea notifications for Apple Watch, which are pending FDA clearance and are expected to be available later this month. This feature uses a new 'Breathing Disturbances' metric to detect signs of moderate to severe sleep apnea in adults without a prior diagnosis.

2024-09

Apple Newsroom

Sleep apnea notifications available today on Apple Watch

Apple announced the immediate availability of its sleep apnea notification feature on Apple Watch in Canada, following a Medical Device License from Health Canada. The feature helps identify signs of moderate to severe sleep apnea in undiagnosed adults by analyzing breathing disturbance data.

2024-10

MacRumors

FDA Clears Apple Watch for Sleep Apnea Detection Just in Time for watchOS 11

The FDA has cleared Apple's Sleep Apnea Notification Feature (SANF) for over-the-counter use, allowing it to roll out with watchOS 11 on Apple Watch Series 9, Apple Watch Series 10, and Apple Watch Ultra 2. The feature is intended to assess the risk of sleep apnea, not to diagnose it.

2024-09

9to5Mac

Apple Watch sleep apnea detection gets approval from Health Canada - 9to5Mac

Following FDA approval, Health Canada has also approved Apple's sleep apnea notification feature for Apple Watch, enabling its rollout in Canada. The feature uses the Apple Watch's accelerometer to detect breathing disturbances and notify users of potential moderate to severe sleep apnea.

2024-09

Psychiatric News - Psychiatry Online

Med Check: Sleep Apnea App, Tavapadon for Parkinson's, DEA Okays Increased Vyvanse Production, and more | Psychiatric News - Psychiatry Online

The U.S. Food and Drug Administration (FDA) cleared Apple Inc.'s Sleep Apnea Notification Feature for marketing in September. This over-the-counter software analyzes Apple Watch sensor data to identify patterns suggestive of moderate to severe sleep apnea in undiagnosed adults.

2024-10

Apple (PDF)

Estimating Breathing Disturbances and Sleep Apnea Risk from Apple Watch

This document describes the development and validation of the Sleep Apnea Notification Feature, a software-based medical device that analyzes Apple Watch accelerometer data to identify breathing disturbances and notify users of potential moderate to severe sleep apnea. It clarifies that the feature is not intended for diagnosis or for individuals already diagnosed with sleep apnea.

2024-09

Apple Newsroom

Groundbreaking health features available today on Apple Watch and AirPods Pro 2

Apple announced the availability of new sleep and hearing health features, including sleep apnea notifications on Apple Watch, to users in Malaysia. The feature uses the 'Breathing Disturbances' metric to identify consistent signs of moderate to severe sleep apnea.

2025-03

The Economic Times

Exclusive: Apple explains how sleep apnea detection and hearing tests are coming to India through Apple Watch and AirPods Pro - The Economic Times

Apple is expanding its healthcare initiatives in India by rolling out sleep apnea notifications on Apple Watch, alongside hearing test capabilities on AirPods Pro. The sleep apnea feature uses 'Breathing Disturbances' to alert users to consistent signs of moderate to severe sleep apnea over a 30-day period.

2026-05

Videos

Product demos, reviews, and walkthroughs for Sleep Apnea Notification Feature (SANF).

How Apple Watch Sleep Apnea Detection Works

CNET

How to Set Up Sleep Apnea Detection on Apple Watch: Major New Health Feature!

AppleInsider

What You Should Know About Appleu2019s Sleep Apnea Feature

CNET

Apple Watch Sleep Apnea Hoax

Dylan Petkus, MD, MPH, MS | Not Licensed by Choice

Sleep apnea detection comes to Apple Watch | 9 News Australia

9 News Australia

Sleep Apnea Detection | Apple Watch | Apple | Apple WatchOS 11 | Apple Event 2024

Startup

View all on YouTube

Frequently Asked Questions

How does the Sleep Apnea Notification Feature (SANF) integrate into our existing EHR system and clinical workflow?

SANF is designed to integrate with major EHR platforms, often via APIs, to provide alerts and relevant patient data directly within charts. This aims to streamline the identification of potential sleep apnea cases, allowing physicians to efficiently review and prioritize patients for further evaluation.

What are the data privacy and regulatory compliance measures in place for SANF, particularly concerning HIPAA and medical device regulations?

SANF is developed with robust data encryption and anonymization protocols to ensure HIPAA compliance, requiring Business Associate Agreements with vendors. As a software-only mobile medical application, it is regulated by the FDA as an over-the-counter device for risk assessment, not diagnosis, and adheres to relevant medical device regulations.

How does SANF compare in accuracy and utility to traditional sleep studies (polysomnography) or other home sleep apnea tests?

SANF is intended as a screening and notification tool to identify signs of moderate to severe sleep apnea, not a diagnostic replacement for polysomnography (PSG), which remains the gold standard. While AI models can show high accuracy in detecting sleep apnea, definitive diagnosis still requires a comprehensive sleep study.

What is the pricing model for SANF, and are there considerations for insurance reimbursement or patient out-of-pocket costs?

Pricing models for healthcare AI solutions like SANF can vary, including subscription-based, usage-based, or value-based approaches. While direct reimbursement for standalone AI screening tools may be evolving, its use can support billing for subsequent diagnostic and treatment services.

What are the known limitations of SANF regarding its accuracy, potential for false positives/negatives, or applicability across diverse patient populations?

SANF is a screening tool and not intended to provide a standalone diagnosis; therefore, it may have limitations in detecting all forms of sleep apnea or in complex cases. AI models can be subject to biases from training data, potentially affecting accuracy across diverse demographics, and the absence of a notification does not indicate the absence of sleep apnea.

What kind of data does SANF analyze, and how does it generate its notifications?

SANF typically analyzes physiological data collected from integrated sensors, such as accelerometer data from a wearable device, to detect breathing disturbances during sleep. Its AI algorithms are trained on extensive datasets of clinical-grade sleep apnea tests to identify patterns suggestive of moderate to severe sleep apnea and generate notifications.

What is the physician's ultimate responsibility when utilizing SANF, given its AI-driven nature?

Physicians retain full responsibility for clinical decision-making, as SANF is a supportive tool designed to augment, not replace, human expertise. Notifications from SANF should prompt further investigation and clinical judgment, not serve as a definitive diagnosis or substitute for a comprehensive medical evaluation.