Deliao-Mall via Amazon offers its Deliao 0.3mm 3D Curved Tempered Glass Screen Protector for iPhone 6 / 7 / 8 or iPhone 6 Plus / 7 Plus / 8 Plus in Black or White for $7.99. Coupon code "ZDIGACLE" cuts it to $5.99. Plus, Prime members bag free shipping. That's $2 off and the lowest price we could find. It's scratch-resistant and features purple-light eye-protection technology. Deal ends February 1, 2018.