Elastic*

Elastic* is a rock physics app for Android OS. It was built in Google App Inventor and we are planning to make it available in the Android Market in May 2011. It was developed and tested on Android 2.3 (Gingerbread).

Functionality
The app is a straightforward calculator. It accepts values for VP and/or VS, and density. Instead of one of the velocities, you can enter a VP/VS ratio if you prefer. The app returns values for all of the elastic moduli.

Features

 * Optionally enter VP/VS ratio instead of one of the velocities
 * If you only provide VP and density, the app assumes a VP/VS ratio of 2.0
 * Shake the phone to reset the form (note: some phones are quite sensitive and reset easily)
 * Click on the star for 'about' info

Parameters
The app computes elastic moduli according to the equations on Evan's rock physics cheatsheet.

Bugs and deficiencies

 * There is no way to use Imperial units of measure

For future release

 * Use km/s or m/s for velocities, and kg/m3 or g/cm3 for density
 * Implement Imperial unit conversion