I just found a great app for your Android devices called "QuiltCalc" on Amazon. It's by Robert Kaufman. It has several uses, from figuring how much fabric is needed, to how many pieces can be cut from a specific piece of fabric. It helps with setting triangles to bindings. It also has other links to Kaufman blogs or stores that carry his fabric. Look in the app store under "utilities" to find it. I had to scroll down the list quite a ways to get to it. Great app to have with you when you're at the LQS!