In the following link is all the information about the TDN app. How to read stockfile, datalogging, troubleshooting.
Our invite code for TDN is: BDKJ-4446
* Note, Sometimes you will not be able to read stock due to it being previously tuned etc, for that please simply turn the key on, engine OFF. In the TDN app please start a log and count to 5 seconds. Then stop the log. At that point please upload/sync the log into our server and let us know. We should be able to put your tune files there after.