From Quicken's legal statement, Quicken can be loaded on up to three computers in one "family". However, there is a restriction that back-up files be saved to only one location. I use only a single computer -- and will be adding my iPad. If you have a home network linking all three, I would presume the back-up could be to a central file available to all three. The iPad installation would not, in my opinion, be counted as an additional computer.