When I got my iphone quilting apps were the first thing I looked for. I have several and don't use them often. but do as search for "quilts, quilting," also do fabric. Joann's has one, Robert Kaufman has one. There are apps for calculating fabric needed for certain sizes Fabric stash is a pretty good one too. but does cost $5 There is one app I have seen advertised magazines, but it is $20. a bit much to me. Just have fun searching!