---
title: relativeStartTime
framework: sensorkit
role: symbol
role_heading: Instance Property
path: sensorkit/srdeviceusagereport/applicationusage/relativestarttime
---

# relativeStartTime

The time the user starts the app relative to the start time of the first app in a report interval.

## Declaration

```swift
var relativeStartTime: TimeInterval { get }
```

## Discussion

Discussion Use this property to order and determine the time between app instances in the same report. The first instance of this property in the report interval is 0.

## See Also

### Timing App Use

- [usageTime](sensorkit/srdeviceusagereport/applicationusage/usagetime.md)