Respiratory Health
Cough Check
A quick cough into your phone reveals signs of respiratory conditions including COVID-19, bronchitis, and TB.
What does Checkup AI measure?
Helfie’s Checkup AI measures your core vital signs, including heart rate, HRV, blood pressure, blood oxygen, respiratory rate, and stress levels, using a short facial scan taken with your smartphone camera.
How accurate is it?
-
HR
Heart Rate
-1.19 bpm
Mean error
-
HRV
Heart Rate Variability
-5.29 ms
Mean error
-
SpO₂
Blood Oxygen Saturation
0.3 percentage points
Mean error
-
SBP
Systolic Blood Pressure
-5.27 mmHg
Mean error
-
DBP
Diastolic Blood Pressure
-3.95 mmHg
Mean error
-
RR
Respiratory Rate
-2.11 breaths per minute
Mean error
Mean error compared with regulated medical devices.
How it works Checkup AI
Your phone camera can detect tiny changes in skin colour caused by blood flowing through the vessels beneath your face.
During a facial scan, Checkup AI uses remote photoplethysmography (rPPG) to track subtle colour changes in the skin that occur with each heartbeat. These changes are too small to see with the naked eye, but the camera can detect them frame by frame. The technology analyses those variations in reflected light to isolate your pulse signal. From the timing, rhythm, and characteristics of that signal, Helfie can estimate key vital signs including heart rate, heart rate variability, blood pressure, blood oxygen saturation, and respiratory rate. All done in around 30 seconds.
Checkup AI - The facts.
What is heart rate?
Heart rate, or pulse, is the number of times your heart beats per minute. A normal adult resting heart rate range is 60 to 100 bpm, though this varies by age and fitness level. Below 60 bpm is bradycardia; above 100 bpm is tachycardia. Read More…
What is heart rate?
Heart rate, or pulse, is the number of times your heart beats per minute. A normal adult resting heart rate range is 60 to 100 bpm, though this varies by age and fitness level. Below 60 bpm is bradycardia; above 100 bpm is tachycardia. Read More…
Why check heart rate?
Helfie checks heart rate because it's a key indicator of overall health and fitness, as it can provide information about the heart’s ability to pump blood efficiently. A slow rate can signal high fitness or an underactive thyroid. A fast rate can point to stress, an overactive thyroid, or anaemia. Regular heart rate tracking may help to monitor unusual variations that may affect heart health or be indicative of other issues.
The science.
In a peer-reviewed study of the underlying camera-based technology, 240 heart rate readings showed a mean error of -1.19 bpm compared with regulated medical devices
What is respiratory rate?
Respiratory rate is the number of breaths you take per minute. A normal adult resting respiratory rate is 12 to 20 breaths per minute, though this varies by age and fitness level. Fewer than 12 breaths per minute is called bradypnea, while more than 20 is known as tachypnea. Read More…
What is respiratory rate?
Respiratory rate is the number of breaths you take per minute. A normal adult resting respiratory rate is 12 to 20 breaths per minute, though this varies by age and fitness level. Fewer than 12 breaths per minute is called bradypnea, while more than 20 is known as tachypnea. Read More…
Why check respiratory rate?
Helfie helps monitor respiratory rate, which can aid in assessing lung function and overall health. Changes may indicate issues such as respiratory infections or metabolic disorders. Abnormal respiratory rates can also be caused by factors such as exercise, stress, medical conditions, and medications.
The science.
In a peer-reviewed study of the underlying camera-based technology, 224 respiratory rate readings showed a mean error of -2.11 breaths per minute compared with regulated medical devices.
What is heart rate variability (HRV)?
HRV measures variation in the time between successive heartbeats. It's a key marker of cardiovascular health and reflects how well your autonomic nervous system, which controls heart rate, blood pressure, and digestion, is functioning. Read More…
What is heart rate variability (HRV)?
HRV measures variation in the time between successive heartbeats. It's a key marker of cardiovascular health and reflects how well your autonomic nervous system, which controls heart rate, blood pressure, and digestion, is functioning. Read More…
Why check HRV?
Heart rate variability (HRV) can help monitor your cardiovascular health, stress levels, recovery, sleep quality, and physical performance. Tracking HRV with Helfie provides insight into the functioning of the autonomic nervous system and cardiac function. Over time it can help identify changes in wellbeing and track progress in health and fitness.
The science.
In a peer-reviewed study of the underlying camera-based technology, 332 HRV readings recorded a mean absolute error of 9.49 ms for inter-beat interval (IBI) and 14.35 ms for SDNN. Results remained consistent across different skin tones.
What is blood oxygen?
Blood oxygen saturation (SpO₂) is the percentage of haemoglobin in your blood carrying oxygen. Haemoglobin is the protein in red blood cells that transports oxygen from your lungs to the rest of your body. Read More…
What is blood oxygen?
Blood oxygen saturation (SpO₂) is the percentage of haemoglobin in your blood carrying oxygen. Haemoglobin is the protein in red blood cells that transports oxygen from your lungs to the rest of your body. Read More…
Why check blood oxygen?
Checking blood oxygen saturation with Helfie provides valuable information about the functioning of your respiratory and cardiovascular systems. Low SpO₂ can point to respiratory issues like asthma or chronic obstructive pulmonary disease (COPD). Changes in oxygen saturation can indicate changes in cardiac function and may be an early warning sign of heart disease.
The science.
In a peer-reviewed study of the underlying camera-based technology, 235 blood oxygen readings showed a mean error of +0.3 percentage points compared with regulated medical devices.
What is blood pressure?
Blood pressure measures the force of blood against your artery walls and is shown as two numbers. Systolic pressure (the top number) represents the force in the arteries when the heart beats. Diastolic pressure (the bottom number) represents the force between beats. Read More…
What is blood pressure?
Blood pressure measures the force of blood against your artery walls and is shown as two numbers. Systolic pressure (the top number) represents the force in the arteries when the heart beats. Diastolic pressure (the bottom number) represents the force between beats. Read More…
Why check blood pressure?
Blood pressure is an important indicator of overall health, providing valuable information about the cardiovascular system. Regular checks with Helfie can help identify high blood pressure, or hypertension, a major risk factor for heart disease, kidney disease, and stroke. Changes in blood pressure can also signal changes in heart and blood vessel function and may be an early warning sign of heart disease. Regular monitoring can also show how medications may be affecting your readings.
The science.
In a peer-reviewed study of the underlying camera-based technology, 463 blood pressure readings showed a mean error of -5.27 mmHg for systolic blood pressure and -3.95 mmHg for diastolic blood pressure compared with regulated medical devices.
What is stress?
Stress is your body's physiological response to mental or physical strain. It can show up in subtle changes to your skin, facial expression, and muscle tension, which Helfie detects during the facial scan to estimate your current stress level. Read More…
What is stress?
Stress is your body's physiological response to mental or physical strain. It can show up in subtle changes to your skin, facial expression, and muscle tension, which Helfie detects during the facial scan to estimate your current stress level. Read More…
Why check stress levels?
Elevated stress over time can affect sleep, heart health, and overall wellbeing. It can also weaken your immune response and disrupt digestion. Regular stress checks with Helfie can help you track changes over time and understand how factors such as exercise, sleep, and other lifestyle factors may be affecting your stress levels.
Got a question? Just ask.
Your personal Health Intelligence (HI) is always there, ready to provide clarity and deeper insights.
Whether you’re curious about what HRV means or want to better understand your results, just type or talk to your Health Intelligence to dig deeper and learn more about your heart health.
More to know about Checkup AI.
How accurate is Checkup AI?
Helfie’s Checkup AI is designed to make regular health monitoring fast and accessible. It uses validated camera-based technology to estimate key vital signs, while your Health Intelligence (HI) helps you track results and trends over time.
- Accuracy
Mean error compared with reference devices:- Systolic blood pressure: -5.27 mmHg
- Diastolic blood pressure: -3.95 mmHg
- Blood oxygen saturation (SpO₂): 0.3 percentage points
- Respiratory rate (RR): -2.11 breaths per minute
- Heart rate (HR): -1.19 bpm
- Heart rate variability (HRV): -5.29 ms
- Algorithm
- Convolutional neural network (CNN)
- Capture mechanism
- Facial video scan via smartphone camera
- Research and clinical validation
- Developed by Helfie R&D Labs and adapted from published, peer-reviewed clinical research. Read more about the science HERE .
How does Helfie track changes in your health over time?
Your Health Intelligence (HI) connects information from your scans, chats, and uploads to build a clearer picture of your health over time. It analyses your readings, identifies trends, and tracks changes instead of treating each check as an isolated snapshot.
This can help you monitor improvements, notice potential warning signs, and understand how changes in sleep, exercise, stress, and other lifestyle factors may be affecting your vital signs.
How does Health Intelligence work?
Helfie’s Health Intelligence (HI) brings together information from your health checks, conversations, uploads, and history, then connects it with a vast body of medical knowledge to build an increasingly informed picture of your health.
Rather than relying on a single AI model or looking at each result in isolation, HI uses multiple layers of intelligence and machine learning to interpret health signals, connect related information across different areas of your health, and understand those results in the context of you.
It also maintains an active memory of your health journey, so previous results, patterns, and interactions can inform what comes next. The result is intelligence that is personal, contextual, and designed to help you better understand and manage your health over time.
How do checks and conversations work together?
A health check gives your Health Intelligence new information about you. You can then talk to your HI about those results, ask what they mean, explore possible reasons for changes, and understand them in the context of previous checks and health history.
The conversation also becomes part of that context. So when you check again later, your HI can consider both your new results and what it’s learned from earlier checks and conversations. This is how it builds a more detailed, connected picture of your health over time.
Can I share check results with my GP?
Helfie makes it easy to share check results and health trends with your doctor or healthcare provider, giving them a broader view than a single reading taken in a clinic.
This additional context can help with things like monitoring hypertension, reviewing medications, or understanding how lifestyle changes may be affecting your health.
Sharing your trends gives your healthcare provider more information to support better-informed decisions.
How does Helfie personalise my results?
To improve the accuracy and relevance of your blood pressure results, Helfie uses a small number of personal details to tailor the calculation to you.
For blood pressure, this currently includes age, birth sex, height, and weight.
The science behind Checkup AI.
Helfie’s checks are backed by the latest research and science.
Explore popular Helfie prompts
Cardiovascular Health
Cardiovascular Health
Cardiovascular Health
Cardiovascular Health
Wellness & Mindfulness
Wellness & Mindfulness
Wellness & Mindfulness
Body & Weight
Body & Weight
Skin Health
Skin Health
Skin Health
Skin Health
Skin Health
Skin Health
Skin Health
Gut Health
Gut Health
Gut Health
Gut Health
Sexual Health
Sexual Health
Sexual Health
Sexual Health
Respiratory Health
Respiratory Health
Respiratory Health
Respiratory Health
