Thanks for all the feedback on RationaCalc!
To celebrate 25,000 downloads, the source for RationalCalc is being released under an MIT license on Github.
If you are simply curious about how an Android application of this type was built or would like to contribute to enhance the functionality, now is your chance.
At 50,000 downloads, we will be releasing a new version with our latest changes as well as any community enhancements that warrent inclusion.
RationalCalc on Github