Single Purple circle (top right)

The puzzle screen shows a diamond shape with similar concentric shapes within. The shapes move as you move the phone.

Solution: To complete this puzzle first lay the phone down on a flat surface so that the internal shapes fit correctly as above.

Then, keeping the phone flat, begin to rotate the phone clockwise through 360 degrees and you will see the small lines extend around the sides and the background fill up. Do not go too fast as it may fail.

Once you have done one full rotation the puzzle will complete.