NEXIS APP

The NEXIS app by iFi Audio allows you to connect the NEO iDSD 2 with your smartphone and/or tablet to control some of its functions.

I don't know if this app is device specific (meaning it may show more functions with other smartphones - for example aptX Lossless is not available in the codecs tab) but in my case it just allowed for audio codec selection, device name change and firmware updates (locally or via the internet).