You can use your iPhone or iPad as a simple one color light source by selecting the color and moving your device in the air in front of your DSLR camera.
Pick two colors to create engaging gradients while moving your device. This mode allows you to select two colors and pick time interval to control how fast colors will fade.
You can choose any number of active stencils, which will change one by one, you can also set different colors to them and use time control to decide how long each stencil will be shown.
This mode allows you to use separate letters as stencils. You can write your own message, pick color, choose the font you like and work the same way as in stencils mode.