Essentially Hopscotch allows superusers to edit Foursquare’s venue database on their iPhones. The official Foursquare app doesn’t really allow for this – you can do some editing by suggesting changes to addresses but you can’t alter incorrect categories or request for one venue to be merged with another. With Hopscotch, you can.
This is very useful because Foursquare is all about going to places and checking in, yet until now it’s been very difficult to fix errors when out and about. Without Hopscotch, superusers had to make notes (mental or otherwise) to go and correct errors when they get back home, or ask for help on Twitter. Now, we can just correct errors quickly and easily.
If you’re a superuser and have an iPhone, Hopscotch is well worth downloading.