TouchDRO is a front end for a do-it-yourself DRO project that uses an Arduino or MSP430-based wireless controller to read a wide variety of scales. More details about the project and the required hardware can be found at http://www.yuriystoys.com/p/android-dro.html.
The app is designed to offer all of the functionality found in a commercial DRO unit, while taking advantage of Android's touch interface. In addition to the standard functions, the latest version of TouchDRO includes the following features:
Readout for up to three linear axes, angular axis, and a tachometer
Configurable user interface with mill and lathe modes
Support for up to six machines
Virtually unlimited point memory, organized into workspaces
Machine-specific tool banks
Graphical workspace preview