I tried it to figure out if it worked. Most of the products on the market are wayy to expensive for what they do. I actually got the app for the itouch and used it for like a month. I would say it helped like 10% improvement in how fast Acne
healed. I wouldn't pay more than that app (1.99) for a device costing 50-70 bucks tho. Its not a complete gimmick tho, but natural UVA rays from sunlight work way better on Acne
and its free. Just walk outside until your skin gets a little pink (but not burned) and then go back inside. The vitamin D also helps fight infections and skin bacteria.