Easy to use touch-screen mobile interface for Android devices, designed for people with sight problems and senior citizens.KoalaPhone is a special application that completely replaces the default phone user interface. You can use Koala for all common tasks like calling people or taking photos.You can write SMS messages on a large keyboard. Koala's touch-optimized applications are unique and include an enlarged camera interface, photo gallery, a simplified alarm clock and a flashlight.Buttons have vibration and sound feedback. SMS messages can be written by voice and there is a SOS button that can be helpful for making emergency calls. The contrast of colors can be increased even further for better readability.