Study Watch vs iCAC Device

Similar category, different focus. These tools serve overlapping but distinct needs. Comparability 60/100 Comparability is an AI-graded 0–100 score of how directly these two tools compete — higher means a more apples-to-apples comparison.
by Verily
VS
by Bunkerhill Health

AI Verdict

Study Watch is a wearable device designed for continuous physiological monitoring in clinical research, collecting real-time data such as ECG and heart rate. Conversely, the iCAC Device is an AI algorithm that analyzes existing chest CT scans to identify and quantify coronary artery calcium. While both tools contribute to cardiovascular health insights, they do so through entirely different data modalities and use cases, making them adjacent rather than direct competitors.

Choose Study Watch if…

Choose the Verily Study Watch if your clinical research requires continuous, high-fidelity physiological data collection from participants over extended periods. This device is ideal for studies focused on developing and validating AI-enabled precision health solutions that rely on multi-modal sensor data like ECG, heart rate, and movement for in-depth analysis.

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Choose iCAC Device if…

Choose Bunkerhill Health's iCAC Device if you aim to opportunistically screen for cardiovascular disease risk by leveraging existing, routine non-contrast chest CT scans. This AI algorithm is best suited for healthcare systems looking to efficiently identify and quantify coronary artery calcium, providing valuable adjunctive information to radiologists for early detection and intervention.

View iCAC Device →

Reviewed by Pouyan Golshani, MD — Interventional Radiologist

Quick Comparison

Feature Study Watch iCAC Device
Pricing Unknown Contact for pricing
Deployment The Study Watch is a wrist-worn, multi-sensor wearable device used for data collection in clinical trials. Data from the watch is encrypted and sent securely to the Verily Cloud using a USB syncing and charging cradle and a wireless connectivity bridge (Verily Study Hub). Software as a Medical Device (SaMD), integrates with PACS or DICOM router. Cloud-based (via Carebricks platform).
FDA Status Cleared AI-estimated Cleared AI-estimated
HIPAA Unknown Yes AI-estimated

Head-to-Head

AI-generated assessment across six dimensions based on each tool's documented features and compliance posture. Grounded in public data — not a substitute for hands-on evaluation.

Usability

iCAC Device

The iCAC Device integrates seamlessly into existing radiology workflows by analyzing routine CT scans, requiring minimal additional effort from clinicians. In contrast, the Study Watch, as a wearable, necessitates patient compliance for wearing and charging, and involves logistical management for device deployment and data collection in a research setting.

Clinical Value

iCAC Device

The iCAC Device offers direct, actionable clinical value by quantifying coronary artery calcium from existing CT scans, a validated marker for cardiovascular disease risk. This provides immediate diagnostic and prognostic information to clinicians. While Study Watch provides valuable continuous physiological data for research, its direct clinical actionability for individual patient management is less immediate compared to iCAC's specific diagnostic output.

Pricing & Value

iCAC Device

Both tools lack public pricing transparency, making a direct cost comparison impossible. However, the iCAC Device offers potentially higher value by leveraging existing, routinely acquired CT scans to provide critical cardiovascular risk information without requiring additional patient procedures or dedicated hardware. This opportunistic screening approach can maximize the utility of existing data, potentially leading to cost efficiencies in risk assessment.

Enterprise Readiness

iCAC Device

The iCAC Device demonstrates strong enterprise readiness through its FDA clearance and direct integration with standard healthcare IT systems like PACS, DICOM routers, and EHRs via the Carebricks platform. While Study Watch is also FDA-cleared and states HIPAA compliance, the ongoing lawsuit alleging BAA/HIPAA breaches against Verily introduces a significant risk factor for enterprise adoption.

Innovation

iCAC Device

The iCAC Device demonstrates greater innovation by leveraging deep-learning AI to opportunistically identify and quantify coronary artery calcium from existing, routine CT scans. This transforms readily available imaging data into a powerful cardiovascular risk assessment tool without requiring additional patient procedures. While Study Watch offers advanced continuous monitoring, the concept of opportunistic screening using AI on existing data represents a more disruptive and broadly impactful innovation in clinical practice.

Support & Docs

Tie

Neither the provided structured facts nor general web searches yielded specific public information regarding the level of support or documentation available for either the Verily Study Watch or the Bunkerhill Health iCAC Device. Therefore, it is not possible to distinguish between the two on this dimension.

Feature-by-Feature

Detail beyond the Quick Comparison summary. For pricing, deployment, BAA, FDA, and HIPAA see the Overview tab.

Feature Study Watch iCAC Device
Name Study Watch iCAC Device
Company Verily Bunkerhill Health
Description Verily Study Watch is a prescription-only, sensor-based wearable device for non-invasive, continuous physiological monitoring in clinical research, collecting data like ECG, heart rate, and movement for analysis in Verily's cloud platform. Bunkerhill Health's iCAC Device is an FDA-cleared AI algorithm that detects and quantifies coronary artery calcium from routine, non-contrast, non-gated chest CT scans, aiding in early cardiovascular disease detection.
Tagline AI-native precision health Building healthcare's system of action with AI for clinical reasoning and action.
Categories Cardiology AI, Wearables & Remote Monitoring (RPM) Cardiology AI
Specialties Cardiology, Neurology, Sleep Medicine Cardiology, Radiology
Key Features Continuous physiological monitoring, Multiple physiological sensors (ECG, heart rate, electrodermal activity, inertial movements), Long battery life (up to one week), Internal data storage and encryption, Cloud-based data processing with algorithms and machine learning, On-demand single-channel ECG, Irregular pulse monitor, E-ink display for minimal power consumption Estimates presence and quantity of coronary artery calcium (CAC), Analyzes routine, non-contrast, non-gated chest CT scans, Utilizes deep-learning algorithms for analysis, Provides adjunctive information to radiologists, Outputs visual representation of estimated CAC segmentation, Delivers exact and four-category quantitative estimates of CAC burden in Agatston units, Integrates with EHRs via the Carebricks platform, Supports opportunistic identification of CAC from existing CT scans

Videos

Demos, reviews, and walkthroughs featuring Study Watch and iCAC Device.

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Frequently Asked Questions

Verily Study Watch (Tool A) is primarily designed for continuous physiological monitoring in clinical research, with data uploaded to Verily's cloud platform. While it can support individual patient care by providing data to healthcare professionals via a web portal, its direct integration into routine clinical workflows for immediate diagnostic or treatment decisions is less explicit than Tool B. Bunkerhill Health's iCAC Device (Tool B) is a Software as a Medical Device (SaMD) that integrates with existing PACS or DICOM routers to analyze routine chest CT scans, aiming to opportunistically identify coronary artery calcium (CAC) and streamline risk stratification without disrupting current imaging workflows.
For Verily Study Watch (Tool A), data is collected and processed in Verily's cloud platform, and while it aims to bridge research and care by integrating with EHR data, the specific data elements automatically pushed into a patient's EHR for direct clinical decision-making are not detailed. Bunkerhill Health's iCAC Device (Tool B) integrates with EHRs via the Carebricks platform, pushing quantitative estimates of CAC burden in Agatston units and visual representations of estimated CAC segmentation to aid radiologists and cardiologists in patient risk assessment and follow-up.
For Verily Study Watch (Tool A), studies have shown its ability to accurately classify sleep vs. wake with a sensitivity of 0.97 and specificity of 0.70, and its ECG feature has demonstrated qualitative clinical equivalence to industry-standard 12-lead ECG devices. For Bunkerhill Health's iCAC Device (Tool B), its performance was validated in a retrospective study, demonstrating an overall alignment rate of 79.7% between device output calcium score groups and ground truth groups, with primary acceptance criteria of 73% overall alignment and at least 65% positive predictive value for each of four calcium score groupings. These metrics for Tool B translate to improved diagnostic confidence by providing automated, quantitative CAC assessment from existing CT scans, aiding in early cardiovascular disease detection and risk stratification.
For Verily Study Watch (Tool A), the learning curve for physicians involves interpreting continuous physiological data from a research context, though patient usage has been reported as easy to explain. For Bunkerhill Health's iCAC Device (Tool B), the learning curve primarily involves radiologists and cardiologists understanding the AI-generated CAC scores and segmentations, which are designed to integrate seamlessly into existing imaging workflows and provide adjunctive information.
Verily Study Watch (Tool A) incorporates internal data storage and encryption on the device, and Verily's cloud platform utilizes strong encryption (in-transit and at-rest), tightly restricted role-based access, and undergoes independent cybersecurity audits like SOC 2 Type II and ISO/IEC 27001 certifications. Bunkerhill Health's iCAC Device (Tool B) integrates with PACS or DICOM routers and operates within the Carebricks platform, which includes security features such as data encryption, role-based access control (RBAC), and audit logs to track algorithm decisions and user interactions.

Backers

Who funded each tool's parent company.

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