Useful App!
Response from developer
Glad the app is working well for you. The labels can be moved. To move, select a label by tapping (will turn red). Then hold and drag the label to the desired location. Also, you can save and restore multiple charts on the device. The list of saved charts can be displayed by swiping from the left edge of the screen to the right, or by selecting "Charts" in the upper left corner.
Missing
Response from developer
The app can indeed show grains per pound of dry air for humidity ratio. Go into settings and change the units for Humidity Ratio to grains/lb, rather than the default lb/lb. Grains of moisture per pound of dry air will now display. Hope this helps. Feel free to contact us at https://www.pheinex.com/contact/ if you have any additional questions.