Sunlight on a person's face can be harsh. You can use this translucent disk to filer the light and make shadows less harsh. You can use the reflector to bounce a little light under their chin as well.
LED Light $$
Throwing a little light on your subject can make a huge difference. When you watch a Hollywood film, you can always see a little glint of light in an actor's eye. This is intentional. You can put one of these small, battery-powered LED lights on a tripod and do the same.
Mobile Phone Mount for Tripod $
This will let you mount your phone on a tripod. Essential.