The Qcanter app is free (red wine glass functionality).
Once downloaded from Play-store or App-store, ask here via email for the activation code valid through 2022. 
We decided to introduce the H.I.T.©    technology behind the Qcanter app free of charge for users. (*)
Have fun and explore the new scientific frontier!

(*) At the sole discretion of our Team, any abuse will be remedied by immediate
deactivation of the code.