---
title: "init(healthStore:device:startDate:)"
framework: healthkit
role: symbol
role_heading: Initializer
path: "healthkit/hkheartbeatseriesbuilder/init(healthstore:device:startdate:)"
---

# init(healthStore:device:startDate:)

## Declaration

```swift
init(healthStore: HKHealthStore, device: HKDevice?, startDate: Date)
```