---
title: Required
framework: bundleresources
role: symbol
role_heading: Property List Key
path: bundleresources/information-property-list/nssensorkitusagedetail/srsensorusagephoneusage/required
---

# Required

A Boolean value that indicates whether your app’s study relies on this sensor.

## Discussion

Discussion The system checks the value for this property when the user declines the access prompt for this sensor. If you set the value of this property to true, the system forgoes installing your app. If false, the system withholds the sensor’s data but installs your app assuming your study can continue at a limited capacity without the sensor’s data.

## See Also

### Sensor usage keys

- [Description](bundleresources/information-property-list/nssensorkitusagedetail/srsensorusagephoneusage/description.md)