Here's how you can download the Ruby Blast app free for Android devices.
1. Go to the Google Play page for the free app Ruby Blast.
2. Tap the Install button.
Here's a description of Ruby Blast:
"Ruby has discovered an ancient dig site full of treasures! Help her blast away the ground, and see what kind of goodies await below!
* Play with your friends
The race is on to blast down as far as possible! Compete with friends for the highest score in our weekly tournament… or seek their help to ease the blasting grind!
* Race the clock
The clock is ticking against you. Keep digging to add time and get the highest score you can!
* Find awesome power-ups
Use the Nova Flare to destroy rows and columns of gems, or call a Star Fall to drop a cosmic boom on the pesky blocks!
* Collect and uncover ancient secrets
Discover rare, giant rubies that lurk in each mine. Collect special gems from mines to fuel exclusive power-ups… and that's just the beginning!"