You can measure as often as you like, but we recommend every other day. The key is to measure in the morning, right after waking up.

Yes. We never share your data with anyone, and it’s securely stored. You can also delete your account and all associated data at any time.

With the most accurate HRV method—spectral analysis—we capture both stress and recovery activity in your autonomic nervous system. It shows how stressed you are and how well you’re recovering.

Smartwatches and Elonga complement each other perfectly. Smartwatches track daily activity - steps, calories, sleep. Elonga measures your body's internal state in 3 minutes each morning: stress, recovery, readiness, and functional age.

Then it syncs your results into a personalized plan, recommending the best daily activities based on how your body is doing. Together, they give a complete picture. See the full comparison at elonga.com/smartwatch.

Elonga syncs with Google Fit and Apple Health. Your activity data flows directly into Elonga. Only the movement data needed for your plan is synced - stress, recovery, readiness, and functional age are measured independently, no manual logging required.

No smartwatch? You can add activities manually. More integrations are coming soon.

Readiness: How prepared your body is for the day.
Stress: Sympathetic nervous system activity on a 0-10 scale, compared to your peers and your personal baseline. Recovery: Parasympathetic activity on a 0-10 scale - how well your body is restoring.
Functional age: How your body's age compares to your calendar age. Lower is better.
Fitness: The long-term impact of your habits on overall fitness.
Plan: A weekly personalized activity plan based on your current and long-term state.

For anyone who cares about their health, lifestyle, and performance - and wants real data to improve them.

Anytime. But remember - Elonga is most effective over the long term, because it lets you compare results across different life stages.

Because Elonga measures your autonomic nervous system, and lifestyle factors like stress, caffeine, diet, and exercise all influence the results. Measuring first thing in the morning - before food or activity - keeps your results accurate and consistent.

Yes. Sleep is a key factor in recovery, and Elonga shows exactly how well you're recovering. You'll see how much sleep is right for you, whether eating before bed affects you, and if that evening drink helps or hurts.

Elonga is most useful at the very onset of an illness - when your body is fighting it before symptoms appear. A sudden HRV drop with no clear cause can be an early sign. Since medication and illness both affect HRV, results may vary. We recommend pausing measurements when you're sick and resuming when you feel fully recovered. Every body responds differently, so always interpret your results in context.