I had an app for calculating the water vapor temp/pressure made.

it's nice to have handy when vacuuming large systems to figure out if you are pulling against moisture or a leak

I had a small laminated table that I used, but I kept misplacing and loosing it, so I had a guy make an easy app for me

it's not 100% scientific, but close enough for what I need it to do.

if you want you can download the app here

https://drive.google.com/open?id=0B3...XZmVndCUm9KMGs

you also have to allow your phone to install an app that is not from google store.
(it should prompt you when you try to install, so just press "allow for this app only")

hope you like it