Eko Duo Review 2026: The Stethoscope That Runs AI Heart Checks

The Eko Duo is a pocket-sized digital stethoscope with a built-in single-lead ECG that can screen for heart murmurs and atrial fibrillation in as little as 15 seconds, using FDA-cleared AI. It pairs with the Eko app to visualize heart sounds and ECG waveforms in real time, record exams, and share them securely. This is a research-based review: no hands-on testing, just specs, pricing, and published reviews.

Most digital stethoscopes just amplify sound. The Duo pairs amplification with AI analysis — Eko’s algorithms have been shown in clinical studies to detect heart murmurs with sensitivity and specificity just under 88%, and atrial fibrillation with sensitivity near 99% and specificity near 97% — comparable to trained professionals. It’s designed for clinicians’ daily use, but patients can also use it at home for longer-term self-monitoring when prescribed by a physician.

Key features

Stethoscope + single-lead ECG in one. The Duo’s chestpiece combines a digital stethoscope diaphragm with two ECG electrodes — capture an ECG with no adhesives or wires, just by pressing it to the skin. It’s a full pocket-sized cardiac examination system, weighing about 108 grams.

FDA-cleared AI murmur and AFib detection. Paired with the Eko app, the Duo’s algorithms screen recordings for heart murmurs and atrial fibrillation, flag abnormalities in seconds, and guide clinicians through a multi-point exam for the most accurate analysis. A 15-second “spot check” from a single position screens for both. The app also detects tachycardia and bradycardia.

Amplified, filterable audio. Up to 60x amplification of heart, lung, and bowel sounds with active noise reduction and four audio filters. You can listen through the included earpieces or wirelessly over Bluetooth with your own headphones.

Record, visualize, share. The app shows the heart-sound waveform and ECG tracing in real time, captures 15–120 second recordings, stores annotated exams in a secure dashboard, and shares them for second opinions — built for telehealth, with live streaming of ECG, waveforms, and sounds. The platform is HIPAA-compliant and SOC 2 compliant.

Second-generation refinements. The 2nd-gen Duo brought improved ECG quality, clearer auscultation sounds, stronger Bluetooth, longer standby battery retention, wireless firmware upgrades, and a 2-year warranty. It charges on a wireless induction pad.

Who it’s for

The Duo is primarily for clinicians — physicians, nurse practitioners, physician assistants, and medical students — who want smarter cardiac assessment without carrying extra gear. The AI screening is a genuine second set of ears for catching murmurs and AFib that a rushed exam might miss, and the recording/sharing workflow fits telehealth practices. It’s also useful for patients prescribed home cardiac self-monitoring: record your ECG and heart sounds at home and send them to your doctor.

What to watch out for

Availability is uncertain. Several medical retailers now list the Duo (1st and 2nd gen) as discontinued, and Eko’s current lineup centers on the newer CORE 500. The Duo may still be findable through distributors, but check stock and warranty support before committing — this is a “buy it if you find it” product right now.

The AI costs extra. The device is $349, but the AI murmur/AFib detection and unlimited recording live in the Eko+ membership — $9.99/month billed yearly ($119.99) or $12.99/month, after a complimentary trial included with purchase. Factor that into the total cost.

Professional device. This isn’t a consumer gadget: federal law limits US sales to healthcare professionals or their orders. It’s also no substitute for a full 12-lead ECG — the AI screens for abnormalities; it doesn’t diagnose.

Pros and cons

Pros

• Digital stethoscope + single-lead ECG in one pocket device
• FDA-cleared AI detects murmurs (~88% sensitivity/specificity) and AFib (~99%/97% sensitivity/specificity)
• Up to 60x amplification with active noise reduction and four audio filters
• Real-time ECG and heart-sound waveforms with recording and secure sharing
• HSA/FSA eligible, 2-year warranty, 30-day money-back guarantee

Cons

• Listed as discontinued by several retailers — availability is shaky
• AI detection and unlimited recording require the Eko+ subscription
• Limited to sale by/on the order of a healthcare professional in the US
• Single-lead ECG is a screening tool, not a full diagnostic workup
• No live telehealth streaming without a subscription plan

Frequently asked questions

What does the Eko Duo do?

The Eko Duo is a pocket-sized device combining a digital stethoscope and single-lead ECG. Paired with the Eko app, it amplifies heart, lung, and bowel sounds up to 60x, captures wire-free ECGs, and uses FDA-cleared AI to screen for heart murmurs and atrial fibrillation in as little as 15 seconds.

How accurate is Eko’s AI?

Clinical studies found the murmur algorithm achieved sensitivity and specificity just under 88%, and the AFib AI achieved sensitivity near 99% with specificity near 97% — comparable to trained professionals. The AI screens for abnormalities; it doesn’t diagnose.

How much does the Eko Duo cost?

The Duo’s MSRP is $349, with a complimentary Eko+ trial included. After the trial, Eko+ (which unlocks AI detection and unlimited recording) costs $9.99/month billed yearly or $12.99/month.

Is the Eko Duo discontinued?

Several medical equipment retailers list the Duo as discontinued as of 2025, and Eko’s current lineup centers on the CORE 500. It may still be available through some distributors, but confirm stock and warranty terms before buying.

Price and availability

The Eko Duo’s MSRP is $349 from Eko and authorized distributors. We could not verify an exact Eko Duo listing on amazon.com — several medical retailers list it as discontinued — so no Amazon link is included here. Check Eko’s website or medical equipment distributors for current availability, and confirm the warranty and Eko+ trial terms before buying.