1Sheeld+ Smartphone Multi-Purpose Shield for Arduino is a new easily configured shield for Arduino. It has a built-in bluetooth low energy module that gives to your Arduino the capability to connect itself to your iOS and Android phones. Thanks to the 1Sheeld app available on the App Store and Google Play Store you can easily associate your Android smartphone to it and turning your smartphone in a shield itself.
Basically, this product consists of two parts. The first part is a shield that is physically connected to your Arduino board and acts as a wireless middle-man, piping data between Arduino and your smartphone via Bluetooth. The second part is a software platform and app on smartphones that manages the communication between our shield and your smartphone and let your choose between different available shields.
By doing that, you can use 1Sheeld+ as input or output from Arduino and make use of all of the sensors and peripherals already available on your smartphone instead of buying the actual shields.