From Nikon:
MELVILLE, NY – Nikon has released the Android version of the SnapBridge app, which enables constant connection of a compatible Nikon digital camera to a smart device*(1) using Bluetooth low energy technology.
SnapBridge Microsite: http://snapbridge.nikon.com/
SnapBridge is an app that offers users a number of convenient services by utilizing Bluetooth low energy technology to enable seamless connection of a Nikon digital camera to a smart device, all while consuming very little power.
SnapBridge can be downloaded free of charge from the App Store and Google Play. The iOS version of the app is scheduled to be available from the App Store later this summer.