Design and implementation of a simple user interface of a smartphone for the elderly

In this paper we present a simple and convenient user interface for the elderly with an open source system platform used in smartphones. This design provides a simplified interface, a large font, a big button and a simple user interface starter for easy operation, and offers the elderly a method for those who are more accustomed to dial phones. Our design includes an improved selective reply text message function, medication reminders, return appointments and a calendar with a list of the simple chores of daily living, and an easy to operate browser for sharing photos with relatives and friends.