GoDusty

You can find dog parks near you
Find playmates, of the same race, age, gender, near you
Find dog-friendly places to eat
Find dog-friendly accommodations
You can check into the dog park, other users will be notified.
You can find canine playmates near you, arrange meetings, get-togethers, etc.
You can create chat groups with your playmates.
There is also a bit of fun in the app, e.g. you can take a picture of a dog and it will tell you the breed.
You can also guess who owns the dog.