Master survey 2016
Relase info - Introducing SURVEY MASTER by ComNav Technology ! GNSS T300 driven by your SmartPhone ...
App - https://play.google.com/store/apps/details?id=com.sinognss.sm.free&hl
Just gonna tip you about this app, similar to the above but havent testet it up with reach yet.
On phone with gps it looks promising.