There is a way to record/export chart data from the Bluetooth App.
Within a project a Chart tile must be used to record data. You can only export the data that is shown within the history chart. The time on the history chart can be lengthened or shortened by editing the history points within the chart settings (for example 100 history points at an update rate of 1 per second = 1m40 of data).
This data can be downloaded as a .CSV file by pressing and holding on the chart tile, giving the option to copy or send the file.
Please click here for a guide video > Exporting Chart Data - How to