The Quilter's Little Helper

I found this app for my iphone and ipad, and it's free!

It's free for android phones as well.

It is a quilt calculator.

It tells you:

Fabric Measurement

Backing and Batting

Piece Count

Pieces to Yardage Area

Binding

Border Yardage

Square-in-a-Square

Set-in and Corner Triangle

I always use the "binding" calculator when I make a quilt. 

I cut my binding 2" wide and this app tells me how much yardage I need to buy for the binding and how many strips I need to cut.

I would recommend that you take a look at it, it's FREE :)