Finally understand
what's driving
your blood pressure.
Most people with high blood pressure don't know which habits are actually causing it. Ziva's AI coach Isabella tracks your sleep, sodium, activity, and stress - and tells you exactly what's moving your numbers each day.
Used by people managing hypertension alongside their doctor.
Ziva Health is an AI-powered health companion for managing conditions like hypertension through daily tracking and personalised coaching. Isabella is Ziva's AI health coach - she reads your blood pressure, sleep, nutrition, and activity data and tells you exactly what's driving your numbers each day, in plain language.
Three steps to understanding your blood pressure.
Hypertension isn't one problem.
It's five - tracked together.
Blood pressure is the output. What drives it - sodium, sleep quality, stress, activity, and body weight - those are the inputs Ziva monitors daily. Isabella connects them so you understand why your numbers are what they are, and what to do about it today.
70% of your sodium is hidden.
Isabella finds it before it spikes your BP.
70% of dietary sodium comes from packaged and restaurant food - not the salt shaker. Ziva logs your meals, calculates your sodium load, and tells you exactly which foods are adding pressure. It then guides you toward DASH-pattern eating: the diet with the strongest clinical evidence for BP reduction.
Poor sleep and high BP
are directly linked. Isabella tracks both.
Ziva syncs with your Apple Watch, Garmin, Fitbit, or Oura ring to track sleep depth, duration, and HRV. Isabella correlates your sleep quality with your morning BP readings - and finds the pattern your doctor doesn't have time to see.
Aerobic exercise lowers BP
for hours after. Isabella shows you in your own data.
A 30-minute aerobic session drops blood pressure for the next 4–12 hours - every time. Ziva tracks your activity from your wearable, shows you this post-exercise dip in your real readings, and builds the evidence that consistent movement is your most reliable BP intervention.
Isabella builds your hypertension
management routine around your life.
Not a generic checklist - a routine shaped by what your data says is actually working for your blood pressure: when to exercise, what to eat, when to measure, and how to wind down for the nocturnal dip that matters most.
What the science says.
Ziva's recommendations aren't guesses. Every feature is grounded in peer-reviewed evidence - Isabella cites the mechanism, not just the headline.
Your doctor should
see what you see.
Whether your doctor already uses Ziva or is hearing about it for the first time - there are two things you can do right now. Both make your care better.
What is hypertension?
Hypertension - commonly called high blood pressure - is a chronic medical condition in which the force of blood against artery walls is consistently elevated. It is defined as a resting blood pressure of 130/80 mmHg or higher according to ACC/AHA guidelines. Because it rarely causes noticeable symptoms, hypertension is often called the "silent killer" - present for years while quietly damaging the heart, kidneys, brain, and blood vessels. In the UK, approximately 1 in 3 adults have hypertension; globally, the figure exceeds 1.3 billion.
Blood pressure stages explained
Blood pressure is expressed as two numbers - systolic (peak pressure when the heart beats) and diastolic (resting pressure between beats). Both matter. The ACC/AHA classification:
Causes and risk factors
Primary (essential) hypertension - accounting for 90–95% of cases - develops gradually over years with no single identifiable cause. It arises from an interaction of genetics, diet, lifestyle, stress, and ageing. Secondary hypertension (5–10%) is driven by an underlying condition such as chronic kidney disease, obstructive sleep apnea, thyroid dysfunction, or certain medications.
The principal modifiable risk factors for primary hypertension are:
- →High sodium intake — the largest single dietary driver; sodium expands blood volume and raises systemic pressure
- →Physical inactivity — a sedentary lifestyle raises vascular resistance and promotes visceral fat accumulation
- →Excess body weight — visceral fat activates the renin-angiotensin-aldosterone system, increasing blood volume and arterial pressure
- →Chronic stress — sustained cortisol and adrenaline maintain vasoconstriction and raise BP setpoints over time
- →Poor sleep and sleep apnea — short sleep and obstructive apnea both suppress nocturnal BP dipping, an independent risk factor
- →Alcohol consumption — raises blood pressure dose-dependently; more than 1–2 drinks per day is a consistent risk factor
Symptoms of hypertension
Most people with hypertension have no symptoms - even with readings as high as 160–170 mmHg systolic. Occasional headaches, visual disturbance, or nosebleeds may occur at very high readings, but are not reliable indicators. This absence of symptoms is precisely why regular monitoring is critical, and why patterns over time matter more than any single reading. A hypertensive crisis (180/120+) may present with sudden severe headache, chest pain, shortness of breath, or visual changes - this requires immediate medical attention.
How to lower blood pressure naturally
Stage 1 hypertension is among the most lifestyle-responsive chronic conditions. A combination of targeted daily habits - sustained over 6–12 weeks - can achieve reductions comparable to first-line antihypertensive medication:
- ✓Sodium under 1,500–2,300mg/day
- ✓Rich in leafy greens & berries
- ✓High potassium & magnesium foods
- ✓Limit alcohol and processed meats
- ✓150 min aerobic activity per week
- ✓Zone 2 (conversational pace) focus
- ✓Resistance training 2–3×/week
- ✓Even daily 30-min walks count
- ✓7–9 hours on consistent schedule
- ✓Screen for sleep apnea if relevant
- ✓Consistent bedtime supports nocturnal dip
- ✓Avoid screens and alcohol near bedtime
- ✓Daily slow breathing (4–7–8, box)
- ✓Mindfulness-based stress reduction
- ✓Regular physical activity (dual benefit)
- ✓HRV tracking as a stress signal
Complications of untreated hypertension
When sustained high blood pressure goes unmanaged over years, it causes progressive damage across multiple organ systems:
- →Heart: Left ventricular hypertrophy, coronary artery disease, heart failure, and arrhythmia — hypertension is the leading cause of heart failure with preserved ejection fraction
- →Brain: Stroke (both ischemic and hemorrhagic), vascular dementia, and transient ischemic attacks — hypertension is the single largest modifiable stroke risk factor
- →Kidneys: Hypertensive nephropathy and chronic kidney disease — damaged kidneys then worsen hypertension in a progressive feedback loop
- →Eyes: Hypertensive retinopathy and increased risk of glaucoma from elevated ocular perfusion pressure
- →Arteries: Accelerated atherosclerosis and arterial stiffening throughout the body — aortic aneurysm in severe cases
What people ask.
Ziva Health is a wellness and health-coaching app. It is not a medical device and does not diagnose, treat, or prescribe. All content is for informational purposes only. Always consult a qualified healthcare professional for medical decisions about hypertension management.
Stop guessing.
Start knowing what's
driving your BP.
Connect your wearables and start logging. Isabella finds the patterns and tells you the one or two things that will actually move your numbers.
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