The Check-in function from Foursquare was already removed and that was the only main purpose of that app when it was released. Now they have come up with major update in app which now available in play store now.
If you still missing the Check-in functionality you can still do that from another app called “Swarm” which came later this year in May. This is basically handling those check-in functions and you can see what your friends are up to. But with the update Foursquare has totally changed its design and functions, where you can lookout for the spots nearby that you like to go.
“The new Foursquare frees you from having to read long, random reviews, wondering if those people share your tastes. With Foursquare, find things based on your tastes, the places you like, and the friends and experts you trust most.”
Still you can find few functions in app where you can like or dislike the place you visit and leave the comments. But unlike in the older version you don’t have to go with the whole paragraph to read the review of the place.