Don't spend your money on this app. – iSpin Toolkit Review

The concept for this app is wonderful. However the app itself does not work in its full capacity. Using the twist per inch, the warp per inch and the angle works wonderfully. However, the calculator crashes the program every time you trying go into it. Also the ruler only gets bigger it does not get larger in rule size. I wish I had read the other reviews before I download the program I would've never purchased it.
Review by PJDoe on iSpin Toolkit.