This is their add for iPhone, but it is out for droids also. The app has 8 formulas and they really work. It takes a few moments for it to load. After it loads there is a banner screen to skip.
The formulas are:
- Fabric Measurement, converts into decimal form and fractional form.
- Backing & Batting
- Piece Count
- Pieces to the Yardage Area
- Broader Yardage
- Square in a Square
- Set-in and Corner Triangle
After I found the app, a costumer came in who needed borders for her quilt. I did the calculations on my phone app and my friend did them on a quilting calculator she had at the shop. Our results matched.
So my suggestion is download it! I have no affiliation with this company, I am just a satisfied user.