Emwave2-export is a project mainly written in Python, it's free.
Export HearthMath emWave2 HRV data
This python script dumps the contents of the HeartMath emWave2 database file into a JSON blob for each entry. The script supports dumping of the user and sessions databases and performs all the necessary format conversions for BLOB fields into typed arrays.
The end goal is to support exporting of emWave2 heartrate variability (HRV) data to the host of other applications that can analyze it, including KubiosHRV.
emwave2-export.py [options] <embd file>
Options:
-h, --help show this help message and exit
-v verbose output
-m MODE mode: session, user or version [default: session]
-o OUTPUT output file
-s SESSION session indices in format A,B,C-D,E,...