Hi, sorry you didn't get an answer- I gave it a try with an Android 4.3 phone and it displayed a text message I received after connecting.
Keep in mind the app only forwards newly received(while the watch is connected) texts and calls. Make sure it shows the correct time and date, which sometimes requires a quick disconnect/reconnect.
Have you checked the serial monitor output when the USB adapter is in the stack? It should at least show if the watch is connected properly or not. It should look something like this, with one text received at the end in my case:
Evt Device Started: Standby
Advertising started
Evt Connected
Evt Pipe Status
Evt Disconnected/Advertising timed out
Advertising started
Evt Connected
Evt Pipe Status
Pipe Number: 10
20 bytes: D2015 09 08 14 23 39
Pipe Number: 10
8 bytes: 1Alex:
Pipe Number: 10
20 bytes: 2I'm sure! But it's