If you’ve reached the point of leaving to check-in applications like Foursquare, Twitter, Instagram, or Batch when you enter a location determined by pure sense, perhaps Arrived is your solution if you want to notify your contacts of your arrival, or your presence. 
The fact is that Arrived sends an automatic notification to your favorite contacts when you enter a key place. Of course all this works depending on how you configure it, notifies the contacts of your choice and only when you come to bars, restaurants, parks and clubs from which you want to launch your notice.The application works by geolocation and alerts your contacts when it detects that you are in the area you have selected. For now is only available for iPhone and you can download it from the apple App Store

Links: Arrived | App Store