Aukey Direct via Amazon offers the Aukey 2-in-1 Mini Clip-on Cell Phone Camera Lens Kit for $14.99, but if you use the code NJHXSGB3 the price drops to only $8.99 Prime shipped. That's $6 off the regular sale price and the lowest it's been offered at Amazon.
The kit comes with a "professional fisheye lens (160° FOV) and macro lens (10X magnification) with universal, detachable clip-on for most smartphones and tablets." It also features "specially designed glass minimizes lens glare, reflection, ghosting and other artifacts." Rated 4.4/5 stars by Amazon shoppers. Read more of this post