To begin you'll want to visit the Apple itunes store and download the Check-In app.
Login with the same Social Tables credentials used to login on your internet browser
Search for an event from your event dashboard or create an event by pressing the + button in the lower right
Click on the filter eye in the bottom left corner to access the filter menu and look at the attendee count in the bottom right to see the percentage of guests who have been checked-in
Choose from Sorting, Check-in Filters and Display Options
Users are able to sort list by attendee's First Name, Last Name, Email or Organization
Users can also organize the guest list by Check-In Status
And, choose up to three labels to be displayed with guest's names
Swipe once to the right to check in your guest
Swipe to the right again to check out your guest
Swipe once to the left to edit an individual guest's information
Further information on the Check In App filters can be found here. But if you need a video refresher on what you've just read or are a visual learner watch this 3 minute video that details all the ins and outs of the Check-In Mobile app
If you are using Legacy Social Tables, check-out the Legacy Check-in App Overview guide here!