Measurements are displayed on the plot in green, the target curve is displayed in yellow with a +/- 3 dB band. When tuning, the goal is to get the average measurement within the target band.
Collect additional measurements by tapping
Remove the most recent measurement by tapping
Clear all measurements by tapping
Switch between plot types tapping or or swipe left/right from the edge of the screen.
Tap plot to show cursor, move with single finger, tap again to hide.
Pinch plot to zoom. Use two fingers to scroll plot left/right.
to start measurement process. HouseCurve will play a test signal through the audio system.
or 
or swipe left/right from the edge of the screen.