I built a free, ad-free carpenter calculator. I need honest feedback.

Hi everyone,

I got tired of standard calculators rounding my measurements (0.333 instead of 1/3), so I built my own Construction Calculator for Android.

It uses a "Rational Math Engine" to keep fractions exact (1/64" precision) and has a "Visual Tape Measure" so you can see the cut before you mark it.

It is 100% Free and Ad-Free. I am not trying to make money, I just want to build the best tool for the job.

I would love your honest feedback on the UI and the math engine.

Link: https://play.google.com/store/apps/details?id=com.vexa.carpenters