Mark Newland
Registered
I don't use Divemate myself, but according to a quick web search, there is a "Data Pack" for Divemate which you need to purchase separately which allows you to export your data in a format that Subsurface can read.
I do have the "data pack" for dive mate which I purchased to ensure that I have a backup of the data in case my phone broke and I can "restore" to my new phone. I was hoping that somebody here had already attempted a transfer of data and knew how much data was actually transferred or if certain portions of the data was lost in the conversion.