3の倍数と3がつく数字のときだけアホになるカウントアプリ

This application is a counting application, and the displayed number changes by pressing the plus button and minus button. But it's not just a counting app! As the title says, it's stupid only when it's a multiple of 3 and a number with 3.
In addition, the screen says "Challenge from Na * atsu". When you press this, you will be asked how many times you have become stupid. Remember how many times you've become stupid! ^^
(Note) It is a very surreal application.