iHandy Carpenter is described as 'An handy carpenter tool kit right on your device!'. There are 2 alternatives to iHandy Carpenter for Android and Windows Phone. The best alternative is Smart Tools. It's not free, so if you're looking for a free alternative, you could try #1 Toolkit.
Smart Tools is a complete package of 5 app sets. It includes 5 Pro sets for a total of 15 tools. In a word, All-in-One. Set 1: Length, Angle, Slope, Level, Thread - Smart Ruler Pro Set 2: Distance, Height, Width, Area - http://alternativeto.