That's pretty low down for a Stemme...

(Alas test logs end up on the web site, visible to the world, and you can't delete them.)

To get the data sent to the web site, meaning Glideport.aero, you need to
* register for an account there
* point the IGCdroid app to your Glideport account
* turn on the app's option (glider icon) to send data to Glideport
* have cellular data signal, at least occasionally
* have the phone's cellular data service turned on