You have my calculator, one in the world.
Those common calculators on your smartphone are now gone.
Make your own.

Express your own personality that is different from others.
Design your own calculator with your loved ones, your cute pets, your favorite brands and more.

All of this can be done very simply.
Make the border of the button,
Make the background color of the button,
I make the font of the button,
Finally, select a background color or background image and you're done.

Congratulations!
You have your own calculator, the only one in the world.