After dabbling with Android programming for years in my spare time (between a full time job and family life) I am proud to present my first app, a Psychrometric calculator. This app uses the latest ASHRAE 2017 Fundamentals Chapter 1 formulas to calculated properties of moist air at a given altitude with and dry-bulb temperature with either wet-bulb, dew point or relative humidity as your input. It also offers both Imperial and Metric units. Simply input the given values and it will automatically recalculate. I am working to add a toggle for humidity ratio to switch lb/lb to grains/lb and kg/kg to grams/kg in the next release coming very soon. I also have some UI tuning to when switching from IP to SI and back. Enjoy! https://play.google.com/store/apps/details?id=com.deltatsoftware.pyschrometriccalc P.S. Sorry iOS users, this is Android only for now. I am dabbling with Xamarin/C# (also in my spare time) to look at doing cross platform and also make a Windows Store version s