Smartwatches in Ramadan: heart and blood-pressure cues, low-glucose alerts, then faith tools on the wrist

As meal and sleep schedules shift during Ramadan, some patients look for a practical way to keep their daily routine steady: medication reminders, early alerts when key indicators change, and a simple log of what happened instead of relying on memory. In this context, a smartwatch works best as an organizing and awareness tool — not a substitute for clinicians or medical-grade devices. That distinction matters even more as exaggerated claims circulate, including watches that claim they can measure blood glucose without a sensor — a type of claim that health authorities have explicitly warned against.

1) Health uses: heart rate tracking and blood-pressure pattern notifications

Heart rate and rhythm alerts

One of the most straightforward day-to-day benefits of a smartwatch is heart-rate monitoring with alerts if readings stay above or below user-set thresholds. Apple notes that Apple Watch can send high- and low-heart-rate notifications, and it also offers irregular rhythm notifications where the feature is available.

Blood pressure: not a live cuff reading

When it comes to blood pressure, accuracy in wording is essential. Apple’s information makes clear that the watch does not provide a real-time blood-pressure number the way a cuff does. Instead, “Hypertension Notifications” are described as pattern-based signals that may suggest persistent elevated blood pressure, and Apple advises confirming with a validated cuff and recording readings (twice daily for seven days) before sharing the record with a healthcare professional.

2) Low blood-glucose: alerts on the watch — but measurement comes from approved CGM systems

A common misunderstanding is confusing “measuring glucose with a watch” with “displaying CGM glucose alerts on a watch.”

What regulators warn against
The FDA says it has not authorized smartwatches or smart rings that claim to measure or estimate blood glucose on their own without a sensor, and it warns that relying on such claims can lead to inaccurate readings and harmful decisions.

Where a smartwatch can genuinely help

A smartwatch can still be useful as a display and alert surface when it’s connected to an approved continuous glucose monitoring (CGM) system. Dexcom, for example, describes “Direct to Apple Watch” for the G7 ecosystem to show CGM data on the watch, and its materials reference CGM alerts such as urgent low and low-glucose alerts within the system.

Bottom line: the watch can help you notice an alert faster — but it is not an independent glucose-measuring device. Any action should remain anchored to approved CGM workflows and clinical guidance.

3) Non-medical Ramadan tools: prayer times, Qibla, and “silent dhikr”

Beyond health tracking, several smartwatch ecosystems now include faith-focused utilities that are especially practical during Ramadan.

Prayer times and Qibla direction
Within Garmin’s Connect IQ ecosystem, “Mecca Finder” is presented as an app that provides prayer times and Qibla direction based on the user’s location.

Silent dhikr: vibration instead of sound

For users who want quiet reminders or counting without drawing attention, smartwatch vibration becomes a simple advantage. Apple explains that Silent Mode stops sounds while keeping haptic (vibration) notifications active, and users can also adjust haptic strength in settings.

Apps built around tasbih counting can also use haptic feedback on Apple Watch to support discreet counting. Examples include tasbih-style apps that explicitly list Apple Watch support and haptic feedback features in their store descriptions.

Key takeaway

Smartwatches can support some patients in Ramadan in a clear sequence: heart-rate alerts and pattern-based blood-pressure notifications, low-glucose alerts when paired with approved CGM, and faith tools such as Qibla, prayer times, and quiet vibration-based dhikr. But the red line is firm: a watch that claims it can measure blood glucose without a sensor is not authorized, according to the FDA.