Routine

You give the cube to the spectator, they mix it, you take it back without ever looking, then you solve the cube behind your back.

Method

Select "Solving the cube" as the routine, and set the option "Wait after mixing" to either 3sec (when practicing) or to 10-15sec (when performing). Turn on "Audio guide (speech)" if you'd like to get audio guide, and select any of the "Onscreen display" options. Then start the routine... Wait till "Ready to go" or "GO" appears after displaying the name of the routine.

Then at any time you give the cube to the spectator to mix. With each turn the timer resets, so you will have to wait X seconds after the shuffle to proceed with solving.

The first two moves will always be "Top forward and Right forward" or "U R", this way the app will know how you're holding the cube. Then you should follow the steps to solve the cube. If you make a mistake, the app will insert a correction move. If you make too many mistakes in a row, the whole solving process will start over.

When the cube is solved, you will see "The cube is solved" or a :-) smiley on the screen. You can restart the routine at any point by turning ANY side of the cube 4 times in opposite directions (forward-back-forward-back). Also you can switch routines while the name of the routine is still being displayed, you do this by turning any side of the cube forward (next routine) or backwards (previous routine). Remember to always wait for "Ready to go" before you start the routine, so you wouldn't accidentally switch routines!