Like everyone else...well done. Great concept, easy to learn, nice results. I'll probably be a paying customer one day.

Font-resizing would be nice on the visual view. And killer feature would be two way interaction, but I can imagine that's a tricky one.

Here's a generic "SaaS subscription workflow" I made up in about 20 mins.

https://code2flow.com/NDIQIf

Love it!