Avoid if you use SI
This app has potential.......but it's way too expensive for what is currently under-developed and buggy. For SI users you cannot re-scale the wet bulb scale to be useful (it is stuck on a directly converted oF scale which is limiting, the wet bulb main scale lines are eg 21.3oC for example rather than a round number). There is no undo button which is very frustrating as it's far to easy to accidentally move a carefully set up and placed process point. The app regularly chucks you out of the function you are trying to carry out and puts you back into the main psych chart part. Very frustrating and a sign of lack of testing.
