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2002
Spectral Analysis of Heart Rate Variability
Improves result comparison and detects subtle changes in body regulation. Functional age compares your ANS to your calendar age.
Track Your Heart, Transform Your Day
Your heartbeat, step by step
Morning Measurements
Put on Elonga's optical sensor each morning for just a few minutes. Measurements are taken right after waking up, so coffee or breakfast won't affect your results.
How It Works – Optical Sensor
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Elonga's sensor shines light through your blood vessels and measures the intervals between heartbeats down to the millisecond, giving you precise HRV (heart rate variability) readings.
The World’s Most Accurate Spectral HRV Analysis
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Unlike most smartwatches that track activity, Elonga focuses on your body’s internal state. Spectral analysis usually takes 20 minutes, but our algorithm does it in just 3 minutes—showing you what’s happening in your autonomic nervous system.
Why 3 Minutes Is Enough
Understanding your autonomic nervous system
Your autonomic nervous system (ANS) has two branches: sympathetic (stress) and parasympathetic (recovery). Everything you do affects the balance between them - and understanding it helps you optimize your health.
Your Results in the App
Elonga evaluates your autonomic nervous system and gives you clear insights into its state. The sympathetic branch reflects stress, while the parasympathetic branch reflects recovery. To simplify, we use Readiness - a single value that combines both. Over time, this helps you understand whether your lifestyle choices are contributing to long-term health.
Functional Age
Are your efforts paying off?
We compare your results with those of your peers to calculate your functional age. This metric shows whether you're heading in the right direction for long-term health.
Track whether you're moving in the right direction over time.
Readiness
A personalized activity recommendation every day.
Each day, Elonga recommends activities tailored to you. Based on your long-term data, they adapt to what works best for your body.
We also create weekly activity plans to keep you on track
Activity recommendations are powered by our mathematical model, developed with physiologist and Elonga co-founder Radim Slachta, who has also collaborated with the WHO.
Stress
Stress: the silent killer.
Elonga helps you monitor stress daily, identifying when it's becoming excessive.
The app also shows what helps lower your stress - and what to avoid.
State of health
Slow down before symptoms appear.
Your body often fights illness before symptoms appear. By slowing down in time, you can potentially cut the duration of illness and recovery by up to half.
Fitness Score
Are you making progress?
Elonga tracks your fitness changes over time, helping you understand if you're on the right path.
Habits
What helps you and what doesn't?
Elonga helps you identify the habits that have the biggest impact on your health.
Track your habits and see how your results change. Discover what's essential for your well-being.
Turn Insights into Action
Elonga gives daily feedback on what benefits or harms your health. You also receive personalized activity recommendations to maximize your fitness, recovery, and overall well-being.
Science You Can Trust
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2008
HRV-Guided Training Improves Athlete Performance
Athletes who followed HRV-guided training achieved better fitness results and set personal records.
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2008
HRV Spectral Analysis in Sports and Clinical Practice
A proven method for accurately tracking stress, recovery, and training loads.
Expert-Led Research
Co-founder Radim Slachta, Ph.D., is a leading expert in HRV and spectral analysis. Elonga's method is backed by decades of clinical studies.
Mgr. Radim Šlachta, Ph.D.
people have experienced Elonga
measurements during development
years of research
