Applying a protector that is tempered glass to your phone or tablet surface is fairly easier than plastics and others. This is because; the glass is stiff and does not stretch during the application. Most of the screen protectors are already cut to the size and shape of the device they are made for and so one action of sticking is all you need. Plastics on the other hand, because of their simple expansion property can stretch during application. Some of them may require re-shaping afterward in order to fit the device properly.
Tempered glass screen cover application does not present this problem of smudging. Applying plastics will require a professional and experienced person to do perfectly, whiles the tempered glass can easily be done by the owner of the device without any difficulty.
They offer better protection to the screen of phones and tablets. This is because when the device is dropped or something hits the surface, the glass absorbs the shock and pressure. If the impact of the drop is so strong to break something, the screen protector is what is broken. With plastics, on the other hand, a drop of the device breaks the screen, as the plastic is thin and is not able to absorb the pressure of the impact.
These protectors are resistant to scratch. This is because of the property of tempered glass that does not allow it to be physically altered unless by application of high heat. With plastic screen protectors, on the other hand, the slightest scratch on the surface leaves a mark. A pen or acrylic nail extensions can even leave scratches on plastics. This makes them look messy and unattractive within a short time of applying.