It is difficult to make a phone call on a smartphone. It's a smartphone screen remodeling app for grandpa to have when he makes a phone call.

・ This application fixes the home screen to a simple screen. If you press the back button (▲) or the home button (●), you will be returned to the screen of this application, so even elderly people will not get lost.

* It is necessary to set this application as the home application when the application is started for the first time. By doing so, you can fix the home screen to the screen of this application. You also need to register your phone number and app. The initial settings are assumed to be performed by those who are accustomed to smartphones.
･ If you register a phone number in the icon on the home screen, you can make a call with one tap.

・ You can also register an application to the icon on the home screen.

・ When you make a call, it will vibrate for 5 seconds when you make a call to make it easy to understand whether you can make a call.

・ If the button is too large, the button will be pressed by mistake, so the button is moved to the center of the screen.

・ Since your mobile phone number is on the home screen, you can see your number.