IOS call screen is a App provides you High Definition Interface of IOS Operating System.
It contains IOS Dialer IOS Call Log IOS Contacts etc.

IOS call screen is a App provides you Reminder Facility.
through which you can set Reminder for making calls & it will invoke at your specified time.

IOS call screen is small and smart app which uses less memory on your smartphone.
also it is Easier Interface compare to android .