HRV Coherence Biofeedback Technology

Based on over 33 years of research at HeartMath Institute, our emWave^® and Inner Balance^™ devices provide real-time heart rate variability (HRV) coherence feedback—showing you exactly when your heart rhythm shifts from stressed to calm, so you can train yourself to maintain that coherent state.

Why Heart Coherence Training is so Effective

Using HeartMath’s HRV biofeedback technology for just 5 minutes a day helps you reduce stress, make better decisions, and improve your interactions with others. Many users say they feel calmer and more centered throughout the day. The technology measures and displays your heart rhythm pattern in real time, revealing how your emotions are affecting your nervous system—strengthening the connection between your heart and brain for better thinking, emotional control, and performance.

Observe your heart rhythm (HRV) which reflects your level of inner balance and your emotional state.

Use scientifically validated techniques to guide you to a state of higher Coherence.

Real-time Coherence feedback confirms when you’ve made the shift and trains you to sustain it.

Inner Balance^™ Coherence Plus

Access a healthy and high-performance state called heart coherence, where your heart and brain are in sync — this helps you prevent or reduce stress, anxiety, and overwhelm, improve health and performance, and clear your thinking for more effective choices.

Buy Now

Just for Inner Balance^™

Three unique apps support the Inner Balance Coherence Sensor.

HeartMath App (Subscription – 7 Day Free Trial)

Health, Performance, Clarity of Thought and Effective Choices

Includes courses, hrv coherence biofeedback-based games, learning outcomes, and practices designed to help you activate meaningful changes throughout your life.

Download Now

Inner Balance App (Free)

Following the Rhythm of the Heart – Basic HRV Coherence Biofeedback

Inner Balance™ gets your heart, mind and emotions in sync to improve health, well-being and performance.

Sign Up Now

Global Coherence App (Free)

Building Coherence Among Family, Teams and Large Groups

You can also join a global network of people who are collectively radiating heart-focused love and intention to the planet.

Learn More

Find Your HRV Coherence Biofeedback Device

Our hrv biofeedback devices help you learn to recognize and shift your heart rhythm patterns in real time. As you practice creating coherence—a smooth, organized heart rhythm—you develop greater ability to self-regulate your nervous system, build resilience, and respond more effectively to daily challenges.

Buy Now

Buy Now

HeartMath^® Institute

Technology Comparison Chart

Choose the product that’s right for you!

Each product provides the same great coherence tracking and training.

Smartphone/Tablet App & Sensor		Computer Software & Sensor for Mac & Windows

Inner Balance™ Coherence Plus with HeartMath App 249 Buy Now Inner Balance Coherence Plus	Inner Balance™ Lightning 179 Buy Now Inner Balance Lightning	emWave2^® 229 Buy Now emWave2	emWave^® Pro 399 Buy Now emWave Pro
Ratings & Reviews
6500 Inner Balance Coherence Plus	6415 Inner Balance Lightning	6320-CH emWave2	6030 emWave Pro
New
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Most Popular
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Product Description
Bluetooth ear sensor and three mobile apps for iOS and Android Inner Balance Coherence Plus	Lightning (wired) ear sensor and mobile app for iOS Inner Balance Lightning	Standalone handheld device with wired ear sensor and software for Mac/Windows* emWave2	USB module with pulse ear sensor and software for Mac/Windows* (HRV Assessment software upgrade available) emWave Pro
Platform
iPhone, iPad, Android phone or tablet Inner Balance Coherence Plus	iPhone, iPad Inner Balance Lightning	Standalone device or connected to desktop Mac/Windows emWave2	Desktop Mac/Windows emWave Pro
Product Compatibility
Apple iOS 16 or later Android 9 or later Bluetooth 4.0 or later Inner Balance Coherence Plus	Apple iOS 11 or later iPhone 5 or later iPad 4th Gen. or later*** Inner Balance Lightning	Mac OS X 10.7 Lion or later Windows 8 or later emWave2	Mac OS X 10.7 Lion or later Windows 8 or later emWave Pro
User sessions saved
Single user*** Inner Balance Coherence Plus	Single user*** Inner Balance Lightning	Single user emWave2	Unlimited users emWave Pro
Talks, guided meditations and techniques playlist
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Games
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Compatible with the Global Coherence app
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Includes new HeartMath app
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Compatible with Inner Balance app
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Can save sessions and synchronize session data across devices
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Adjustable breath pacer
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
HeartCloud manuals, resources and updates
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Patented HeartMath coherence algorithm
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
World class, high speed HRV sensor technology
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
60 Day Money-Back Guarantee
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
1 Year Warranty
Inner Balance Coherence Plus	Inner Balance Lightning	emWave2	emWave Pro
Product Details
Buy Now Inner Balance Coherence Plus	Buy Now Inner Balance Lightning	Buy Now emWave2	Buy Now emWave Pro