Cuff

Health Data & Permissions

Last updated: June 10, 2026

Connecting Apple Health (HealthKit) or Android Health Connect is optional. Cuff works fully without it — you can type readings in manually. If you do connect, Cuff requests read-only access to the data types below, and every one of them is processed and stored on your device only.

Our commitments

  • Health platform data is used solely for features you request inside the app: your private log, trends, insights, and doctor report.
  • It is never transmitted off your device, never used for advertising, never sold, and never shared with third parties.
  • It is never used for machine learning or model training, and never for credit, insurance, employment, or eligibility decisions.
  • The Cuff iPhone and Android apps are read-only — they never write to Apple Health or Health Connect.
  • The optional Cuff Apple Watch app saves its heart-rate measurement sessions to Apple Health (that is how readings reach your iPhone). Those sessions stay in your Apple Health store under your control and can be deleted there at any time.

Each permission, and why

Blood pressure (read)

Cuff is a blood pressure journal. You can import your cuff readings from Apple Health or Health Connect instead of typing them in manually. Readings are stored only on your device and shown in your own log, trends, and doctor report.

Heart rate (read)

Import heart-rate readings from your watch or tracker — including readings taken with the Cuff Apple Watch app — to see them alongside your blood pressure. On-device only.

Resting heart rate (read)

Import your daily resting heart rate to track it next to your blood pressure over time. Stored on the device only.

Heart rate variability (read)

Optionally import HRV as a recovery indicator shown alongside your blood pressure trends. On-device only.

Blood oxygen (read)

Optionally import blood-oxygen readings from your wearable — useful for discussing possible sleep-related factors with your doctor. On-device only.

Steps (read)

Optionally pull in daily step counts so the app can show how your activity lines up with your blood pressure readings. Step data stays on the device and only appears in your own insights.

Exercise / workouts (read)

Import exercise sessions so the app can show how activity lines up with your readings. On-device only.

Cardio fitness — VO₂max (read)

Optionally import your cardio-fitness score to track long-term heart health alongside blood pressure. On-device only.

Sleep (read)

Optionally import sleep duration as one of the lifestyle factors the app compares against your blood pressure. Processed and stored on the device only.

Hydration (read)

Optionally import daily water intake as one of the lifestyle factors the app compares against your blood pressure. Processed and stored on the device only.

Nutrition — sodium & caffeine (read)

Optionally import nutrition entries (sodium, caffeine) to track diet alongside your readings. Stored on the device only, never uploaded or shared.

Alcohol (read, Apple Health)

Optionally import logged alcoholic drinks as a lifestyle factor the app compares against your blood pressure. On-device only.

Weight (read)

Optionally import your weight to track it alongside blood pressure over time. Stored on the device only, never uploaded or shared.

Revoking access

You can revoke any or all permissions at any time — Cuff keeps working with manual entry:

  • iOS: Settings → Health → Data Access & Devices → Cuff, or Settings → Privacy & Security → Health → Cuff.
  • Android: open the Health Connect app → App permissions → Cuff.

Copies already imported into Cuff stay on your device until you remove them — delete individual entries or use Settings → “Delete all my data”. See Data Deletion and our Privacy Policy for the full picture, or email support@cuffapp.com.