Start with the permissions you choose
Apple Health access is read-only. You decide which compatible signals the app may read, and Health iAge does not write back to your Health records. No health-data account is required to begin.
The estimate still depends on sufficient, recent, supported evidence. An Apple Watch can contribute useful signals, but it is optional; the compatible data already available on your iPhone is the starting point.
A useful glance on your wrist
The companion Apple Watch app displays a limited, derived snapshot from your paired iPhone. Your current estimate, direction, and freshness can be close at hand while you get on with the rest of your day.
That snapshot keeps the wrist experience focused. The iPhone remains the place to explore the underlying context, available evidence, and longer view, rather than treating a brief glance as a complete account of your health.
Controls that remain yours
You can change your Health permissions and delete the app’s local health data in Settings. Keeping those controls accessible helps privacy remain an everyday choice, rather than a decision made only during setup.
Optional product diagnostics are governed by consent and described in the Privacy Policy. They are separate from your on-device health samples and wellness calculations, which are not uploaded to create a developer health-data profile.