If for whatever reason you don't get there in the designated timeframe, a prompt on your iPhone will pop up asking if everything's OK. When you arrive at your destination, Check In automatically sends out a message to your chosen contact to let them know you made it there safely. You can cancel or add extra time afterward if you decide to make a stop or two along the way. To finish the process, hit Done followed by Send. You'll have the option to toggle the time you anticipate it will take to reach your destination depending on your mode of transport.

You can adjust the Check In details of your message by tapping Edit. Limited shares location data, battery life and network signal to your chosen contact, while Full includes all that plus information on your route and location data from when you last unlocked your iPhone or removed your Apple Watch.

To start, you’ll need to decide whether to grant Limited or Full data-sharing access. If it's your first time using Check In, just follow the on-screen steps to get through the rundown.

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