iTunes Link:
CHAOS FREE
This is basically a bejeweled game with gravity and elemental effects.
Best of all, it is free compared to bejeweled's $2.99 price tag.
Depending on how your hold your device, the blocks will fall in different directions.
When you create chains or eliminate more than 3 blocks at a time, you can gather block energy.
Once, full, the energy turns into a elemental blocks.
You can drop blocks in any location in grid and create a chain reaction with other elements.
Elements react with the following rule:
Fire burns air, air blows away earth, earth soaks up water, and water douses fire.
All elements also automatically assimilate the same elements.