I use square with my phone. I am told that there are a few more things you can do with square with an Ipad that you can not do with an Iphone. The mini Ipad is coming out soon and is not as expensive as the the latest Ipad. I guess a big part of it is how much you will get out of a new phone/ verse an ipad. Personally, I use my Iphone for a lot of the things I would probably use an Ipad for, so for me personally, its probably not worth the investment. My mom on the other hand, is constantly using her Ipad, more than her Iphone.