Potentially very cool app, but it has no privacy policy (and it's a free app, with no obvious means of funding). There's therefore no baseline from which to judge how much to trust it with potentially sensitive tasks or machine accesses.
There's no funding - it's a side-project. You'll have to trust me when I say the app isn't tracking anything about the json data or passing it on to other servers.. it only uses what data you provide using the json protocol to render the UI in the app.