Homebrewing is all about simplicity.
Here's an app for those of us that like to relax with a beer that was crafted by ourselves and our buddies without hassle, pressure or too much complexity. AlcCalc is a simple Potential Alcohol Calculator. Just enter your Starting and Final Gravities and 'viola!' you've got your homebrew's ABV.
AlcCalc was crafted under the influence of a 6.3% ABV Chinook and Cascade APA made on the developers kitchen stove with the aid of just a hint of Irish Whiskey.