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What your readings say, and an optional AI assistant.
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Your data stays on this device.
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Install on iPhone or iPadTap the Share button in Safari, then “Add to Home Screen”.
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Readings are saved only in this browser. Nothing is uploaded and there are no accounts. Use the same browser each time, and export a backup now and then.
How the baseline works
- Measure the same way each time. Sit with your back supported, feet flat, arm at heart level, after 5 quiet minutes. Skip caffeine, exercise and smoking for 30 minutes.
- Take 2 or 3 readings a minute apart. Kayline averages them into one session.
- Measure morning and evening for about a week. Home-monitoring guidance suggests this and drops the first day.
- Tag what is going on. Only seated readings with no coffee, exercise, meal, stress, alcohol, nicotine, full bladder or illness count toward your baseline. Everything else is compared against it.
| Category | Systolic | Diastolic |
|---|
Categories follow the AHA/ACC guideline, unchanged in the 2025 update. A diagnosis needs averaged readings on more than one occasion. Source: 2025 AHA/ACC High Blood Pressure Guideline. “Low” (under 90/60) is an informal flag, not a guideline category.