notificationResponsivenessMs property
The millisecond delay between entering the zone and receiving the notification.
Only supported on Android. Ignored on iOS.
Defaults to 0. Setting a big responsiveness value, for example 5 minutes, can save power significantly. However, setting a very small responsiveness value, for example 5 seconds, doesn't necessarily mean you will get notified right after the user enters or exits a geofence: internally, the geofence might adjust the responsiveness value to save power when needed.
Implementation
final int? notificationResponsivenessMs;