by small accident, I've also purchased it and Hanka (wife) took me it and use it, damn
. Anyway this nice tool from what I noticed, measure HR values just form time to time or on request. So it simply cannot be used as exchange for heart rate belt.
Second side is that there is no official API, I was already looking on this. There are some un-official methods, but nothing enough stable and usable I think.
So sorry, except some vibrate notifications, I see no options how to use this together with Locus Map app.