Barricade calculator app has been updated to version 2.1 in the App Store.

It’s product page with app store link may be found in the following link;

http://www.lancehenderson.com/barricade/

This version adds the ability to add shielding in addition to the collimator.  This can be added in inches rather than in the half-value layers.  The default colimator is still added in half-value layers.

Other improvements include faster performance and retina graphics for the iPhone.