# 8. Additional Requirements

## iOS Region Monitoring

The Sentiance SDK uses the [region monitoring](https://developer.apple.com/documentation/corelocation/monitoring-the-user-s-proximity-to-geographic-regions) feature provided by iOS. There is currently a per-app limit of 20 regions that can be monitored at any point in time. This limit is enforced by iOS.

For proper operation and detections, please ensure that the Sentiance SDK can monitor **2 regions** at any given time.


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