We have covered various periscope lenses for smartphones in the past. This universal Periscope Lens is an affordable solution that lets you capture pictures at any angle or peek around corners. You can use it to take photos without being noticed. This pocket-sized attachment is lightweight as its made from high-grade aluminum.
The magnetic lens swivels 360-degrees, so you can take shots while viewing your screen. It should work for most smartphones. Sets you back under $12.