What are the minimum smartphone requirements to use the EyeQue Insight?

The EyeQue Insight visual acuity screener requires a smartphone with the screen resolution of at least 300 pixel per inch (PPI) and a display screen size of at least 4.7 inches . The EyeQue Insight App supports both iOS or Android operating systems.  Phones that do not have the correct display size or PPI will not be able to properly run the app.