The demo its easy to understand , even on my phone. I don't know if I will use it on my phone as I prefer to be in the front of a big screen when I decide about money
I believe there will be a WEB version available that is currently in ALPHA stage (as you can read in the webpage FAQ).
The link is
https://alpha.vesa.io (currently down)
I will get back with more details soon!
Thanks.