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 .