# FreeStyle Libre and Apple Health: what you can see together

> Apple Health stores blood glucose, insulin and carbs written by different apps, and you decide which apps may read or write each one. Dulce only reads from Apple Health (glucose, insulin and carbs, with Dulce Pro) and never writes to it; your sensor glucose reaches Dulce through LibreLinkUp, not through Health. You can revoke Dulce's access at any time in the Health app.

URL: https://dulceglucosa.com/en/blog/freestyle-libre-and-apple-health  
Author: Levan Khimshiashvili  
Published: 2026-10-19  
Updated: 2026-10-22

Apple Health is where your iPhone gathers health data from different apps and devices: steps, sleep, weight and, if you have diabetes, glucose, insulin and carbs too. The usual question is how your FreeStyle Libre fits in and what Dulce does with that data.

## What diabetes data Apple Health stores

Apple Health has categories for **blood glucose**, **insulin delivery** and **carbohydrates**. Each app writes what it wants, and you decide which apps may read and write each one. To see who writes your glucose, open the Health app, search for "Blood Glucose" and open **Data Sources & Access**.

Which apps write there depends on your sensor, your country and each app's version, so that screen is the most reliable place to check.

## What Dulce does with Apple Health

Dulce **only reads**. It never writes anything to Apple Health. It can read three things, and you choose which:

- **Glucose**: for example, readings from a Bluetooth meter that saves its data to Health.
- **Insulin**: for example, from a smart pen or another app where you log it.
- **Carbs**: for example, from a nutrition app.

That data appears in the [Logbook](https://dulceglucosa.com/en/blog/diabetes-logbook-carbs-and-insulin) and in [Trends](https://dulceglucosa.com/en/blog/glucose-trends-time-in-range-gmi) next to your sensor readings, marked "from Apple Health". So what used to be spread across several apps sits in one place.

## How to turn it on

1. **Open the Apple Health settings in Dulce**: In Dulce, go to **Settings** and find the **Apple Health** section. You can also start from the "See your Apple Health data in Dulce" card in the Trends tab.

2. **Choose what to read**: Turn on Glucose, Insulin or Carbs. It's a Dulce Pro feature, with a 14-day free trial.

3. **Grant permission in iOS**: iOS shows its Health permission screen. Tick the categories you want to share with Dulce and tap **Allow**.

In Settings you'll see when Dulce last read each category.

[Bring your sensor and Apple Health together in Dulce](https://apps.apple.com/app/apple-store/id6770694596?pt=127601978&ct=blog_apple-health&mt=8)

## How to revoke permission

You can revoke it any time from your iPhone: in the Health app, tap your profile picture, open **Apps** (or **Apps and Services**), choose Dulce and turn off what you don't want to share. You can also turn each category off in Dulce's settings.

## Privacy

Data Dulce reads from Apple Health is used to show it to you in the app. Dulce has no ads and doesn't sell data. The details are in our privacy policy.

## FAQ

**Do I need Apple Health to use Dulce?**

No. Dulce gets your glucose from the sensor through LibreLinkUp. Apple Health is optional and adds data from other apps.

**Does Dulce send my glucose to Apple Health?**

No. Dulce only reads from Apple Health; it writes nothing.

**Does Apple Health data show on the Live Activity and Apple Watch?**

No. Those show your sensor readings. Health data appears in the Logbook and in Trends.