But the header for that file says:
* This is a DEMO. You can use it only for development and testing.
*
* If you would like to add these features to your product,
* please contact Blynk for Business:
*
* http://www.blynk.io/
I think that if you want to do some testing before buying then you should head over to http://www.blynk.io/ and ask the question there.
Pete.