Tmart offers this Clear Screen Protector for iPhone 4 / 4S for 99 cents. Coupon code “TMARTISP” cuts it to one cent. With free shipping, that’s tied with our March mention and a buck below the lowest total price we could find for a similar screen protector. It’s reusable and features 99% UV protection, anti-scratch film, and more. Coupon expires after 500 redemptions.