Like Quozio? You'll ❤️ Quozio Pro! Check it out.
"Choose diagonal lines when possible. They keep the eye moving across the body, making you look thinner. Choose two vertical lines far apart, and you will broaden and shorten your look. Place them close together for a more slender illusion. Curved lines that follow the body are the most flattering. Asymmetrical lines also make you look thinner."