That looks really cool and I like that it isn’t a website. There’s a Whitfield Diffie quote I’ve mentioned a few times on HN. It’s from Ellen Ullman’s book Life in Code[1]:

> We were slaves to the mainframe! [Diffie] said. Dumb terminals! That's all we had. We were powerless under the big machine's unyielding central control. Then we escaped to the personal computer, autonomous, powerful. Then networks. The PC was soon rendered to be nothing but a "thin client," just a browser with very little software residing on our personal machines, the code being on network servers, which are under the control of administrators. Now to the web, nothing but a thin, thin browser for us. All the intelligence out there, on the net, our machines having become dumb terminals again.

Applications like yours claw back a little of that power. Very nice.

[1]:https://archive.org/details/life-in-code-a-personal-history-...