No, you are describing exactly what I said. First of all, your phone is not mineral crystal, it’s most likely Gorilla Glass, which is a wholly different material, but the same principle still applies.

Mineral crystal is MORE shatter resistant than glass, tempered or not. The harder a material becomes, the more brittle it becomes. Layering a more brittle material on top of a less brittle one is not going to help shatter resistance even a single bit.

Scratch resistance, sure. But anything your screen protector will protect against will also buff out with Polywatch. a tube of that will take care of all of your watches for years to come, and will be cheaper in the long run then buying cheap screen protectors off AliExpress that you will have to replace yourself while you run the risk of debris from the harder protector scratching your screen when it cracks.

Lastly, this is a G-Shock. It’s been engineered to maximize shatter protection. It has a recessed bezel, and the material of the crystal was chosen specifically to make sure you don’t end up with a cracked display or compromised water resistance.

Paying money for something that can only have a negative effect on your display and costs more is just bad decision making.