Today you can download iReward Chart free for android devices. Here is a little about this app:
The iRewardChart app makes it easy to reward your children for good behavior and keep them motivated. Simply type their name, select a few tasks from the list of suggestions, and reward their accomplishments with a single tap in the weekly chart.
The app also allows you to set up abstract goals like “Patience” and “Sharing with Others” in order to reinforce the values you want your child to learn. When stars have been earned, your child can pick from the default list of suggested rewards, or you can customize the rewards.
This looks like a helpful app if you have small children. It is geared toward kids ages two to seven.

just downloaded this to my fire–thanks. we also use myjobchart.com Its free.