I've used BLE in the past. While its fairly nice, android support is all over the place. Each manufacturer has their own library. Then you need to factor in al

I've used BLE in the past. While its fairly nice, android support is all over the place. Each manufacturer has their own library. Then you need to factor in all that time spent hooking into the various native code libraries. With something like micIO all you'd need is a 4 pole minijack and an HTML5 browser. Aka all smartphones minus windows phone (http://caniuse.com/audio-api http://caniuse.com/audio-api). For low bandwidth applications this can be pretty useful. Think about all those wearable electronics. Obviously work still needs to be done to get micIO to a stable state.