Which App is best to use with IOS and Android.

[VaughnVenter]

We busy developing a system using the A4 board where we need to display the following on the App:
The same app must be available for IOS and Android.

Scaled value of the Analog inputs. ( Read value )
Digital input state ( Read value )
Relay/ Digital output state  ( Read value )
Internal values used as setpoints to triger the Digital outputs. ( Read & Write value )

Thanks.
Vaughn.