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Phone Watermark will let you add your custom watermark to your phone that will be visible across all the phones no matter what application you are using it will always be visible for you unless you stop it.
Phone Watermark
Add Watermark to your phone and make it more personal
By this simple Android application you can change the design of your Smart Phone notch in any android device.
There are hundreds of designs to choose and every type of android smartphone is supported even S20, OnePlus 7, etc.
Notch Design
Change the design of your Smart Phone notch