Yes, but Zones must first be created or joined on an iPhone. You can then log in to an Analog account from an iPad.
More Information:
iPads can't tap beacons and join Zones on their own. However, since iPads run the same OS as iPhones, you can download the Analog app and log in using existing account credentials. Note that if your child uses the iPad, login with a child's Analog credentials, not yours as the parent.