Update README.md

Author: Dallas62

README.md

@@ -478,7 +478,7 @@ https://developer.android.com/training/monitoring-device-state/doze-standby
 
 ## Repeating Notifications
 
-(optional) Specify `repeatType` and optionally `repeatTime` while scheduling the local notification. Check the local notification example above.
+(optional) Specify `repeatType` and optionally `repeatTime` (Android-only) while scheduling the local notification. Check the local notification example above.
 
 Property `repeatType` could be one of `month`, `week`, `day`, `hour`, `minute`, `time`. If specified as time, it should be accompanied by one more parameter `repeatTime` which should the number of milliseconds between each interval.