I initially made this converter as a website for myself because I kept getting confused with bitcoin units and prices. Then, I made it into an app and put it on the Google Play store for anyone to use, for free. My thoughts were that this would be my tiny contribution to Bitcoin and crypto. I hope you find the app useful.
Secondly, though it isn't necessary, here are ways you can say thanks if you wish:
Even a few satoshi or finney or LTC or DOGE (yes, doge!) are appreciated and would simply make my day--it's the thought that counts!