Your iPhone already tracks your steps, heart rate, sleep and blood pressure through Apple Health. But when it comes to medications, most of that data sits in silos. You take your pills in one app, check your vitals in another and never see how the two connect.

Here's how to bridge that gap and why it matters more than you think.

What Apple Health actually tracks

Apple Health is a central hub for health data on your iPhone. It pulls in metrics from your Apple Watch, connected devices and third-party apps, including:

  • Heart rate and resting heart rate from Apple Watch
  • Blood pressure from connected monitors (Withings, Omron, etc.)
  • Sleep stages and duration from Apple Watch or sleep trackers
  • Blood oxygen (SpO2) from Apple Watch
  • Steps and activity from your iPhone or Watch
  • Respiratory rate during sleep
  • Heart rate variability (HRV), a key stress and recovery indicator
  • Weight from smart scales
  • Blood glucose from continuous glucose monitors

Since iOS 16, Apple Health also includes a Medications section where you can log what you take. But it has significant limitations.

The problem with Apple's built-in Medications feature

Apple added Medications to the Health app in iOS 16, and it has improved since then. You can add your medications, set reminder times and log whether you took them. It checks for drug interactions, and since iOS 17 it supports follow-up reminders, Critical Alerts that break through Focus modes, and you can log doses as Taken or Skipped directly from notifications.

It handles the basics well. But there are still significant gaps:

  • No adherence tracking. There is no percentage, no streak and no way to see how consistent you have been over a week or month.
  • No health correlations. Your blood pressure data and your medication data live in the same app but never talk to each other. You cannot see whether your BP improved after starting a new medication.
  • No insights or trends. There is no dashboard showing your patterns over time. Did you miss more doses on weekends? Are your mornings or evenings more consistent? Apple Health will not tell you.
  • No supply tracking. You cannot track how many pills you have left or get a heads-up when it is time to refill.

For someone managing one simple vitamin this might be enough. For anyone taking multiple medications, especially time-sensitive ones like blood pressure or thyroid medication, these gaps matter.

Why connecting medications with health data matters

The real value isn't just remembering to take your pills. It's understanding what happens when you do.

Consider someone taking Lisinopril for high blood pressure. They've been on it for three months. Their doctor asks: "How's the medication working?" Without data, the answer is usually "I think it's fine?" or "I feel about the same."

But if you could see your resting heart rate trend alongside your medication adherence, you might notice that weeks with perfect adherence correlate with lower resting heart rates. Or that missed doses over a weekend showed up as a blood pressure spike two days later.

This isn't hypothetical. Research consistently shows that patients who track their adherence alongside health outcomes have better medication persistence and make more informed decisions with their doctors.

The data is already on your phone. It just needs to be connected.

How to track medications alongside Apple Health data

To get the full picture you need a medication app that reads from Apple Health, pulling in your vitals, sleep and activity, and displays that data alongside your dose history.

Here's what to look for in a medication tracking app with Apple Health integration:

  1. HealthKit read access. The app should request permission to read relevant metrics (heart rate, blood pressure, sleep, etc.) from Apple Health. This is a one-time setup.

  2. Correlation insights. The app should surface connections between your adherence and your health metrics. Not just raw numbers but patterns: "Your resting heart rate averages 4 bpm lower during weeks with 90%+ adherence."

  3. Trend visualisation. You should see your medication adherence and health metrics on the same timeline, making it easy to spot relationships.

  4. Journal and mood tracking. Quantitative data (heart rate, BP) tells part of the story. How you feel, your energy, mood and side effects, fills in the rest.

  5. Privacy-first architecture. Your health data should stay on your device, not uploaded to a company's servers.

Cadence is built specifically for this. It connects to Apple Health and pulls in 10 health metrics including heart rate, resting heart rate, blood pressure, respiratory rate, SpO2, steps, weight, blood glucose, sleep and HRV. It then displays them alongside your medication schedule, adherence trends and journal entries.

Setting it up: a quick walkthrough

Getting your medications connected to Apple Health data takes about two minutes:

  1. Add your medications. Enter each medication with its name, dosage and schedule times. You can also point your camera at a prescription label and Cadence will read and auto-fill the details.

  2. Enable Apple Health. In Settings, toggle on Apple Health integration. iOS will ask you to approve which health metrics Cadence can read. You can grant or deny access to each metric individually.

  3. Take your doses as usual. When a reminder fires, take, skip or snooze right from your lock screen. No need to open the app.

  4. Check your Insights tab. After a few days the Insights dashboard starts showing your adherence trends, health metric correlations and patterns. The longer you use it, the more meaningful the data becomes.

The key insight: you don't need to change your routine. Just take your medications when reminded and the app handles the rest, pulling health data from your Watch and connected devices, computing correlations and surfacing what matters. You can see more about how the Insights dashboard works on the Cadence homepage.

What you'll actually see

After a week or two of consistent use the Insights dashboard shows:

  • Monthly adherence percentage with week-over-week trends
  • Health metric cards showing your averages and how they compare to weeks with high vs. low adherence
  • Best time of day and day of week for your consistency
  • Mood and energy trends if you use the daily journal check-in
  • A heatmap calendar showing your adherence pattern at a glance

For people on blood pressure medication, seeing the correlation between adherence and resting heart rate is often the "aha" moment. The numbers make the abstract ("I should take my meds consistently") concrete ("My resting heart rate is 6 bpm lower when I don't miss doses").

Making your medication data work for you

Apple Health is already collecting valuable data about your body. Your medication schedule is already part of your daily routine. The missing piece is connecting the two so you can actually see the impact of your consistency.

You don't need to be a data scientist to benefit from this. You just need an app that does the work of pulling it all together and shows you what your habits are actually doing for your health.

If you're interested in what consistent tracking actually looks like in practice, read about what 90 days of medication tracking revealed. And if you're still adding medications manually, the prescription label scanner can save you a few minutes of tedious typing. For a deeper look at why consistency matters so much, see our guide on medication adherence. If you wear an Apple Watch, you can also get medication reminders on your wrist.

Cadence is a free medication reminder app for iPhone. Apple Health integration is available with Cadence Pro ($9.99, one-time purchase). No account required, no subscription.