I find the web based calculators to be difficult to use on my phone when I'm in the lab, and was not able to find an easy/simple app, so I made one.
It's iOS only for now, It's free, I don't want anything from you. I hope you find it helpful, and I'd appreciate any feedback, additional calculators etc.. whatever you'd find handy to have in hand while practicing your craft.
I can release it for android as well if there's interest, I may or may not do that. I will add imperial units however (but really you should use metric
)https://apps.apple.com/ca/app/distiller ... 1600736639
If you already use an app that does this, let me know! I couldn't find one.
Anyhow, hope it's useful.