I love that you took the programmer equivalent of a writing cue and ran with it. And I think this is a really cool idea to explore.

I know it's largely a one person experiment and not a real business, but some feedback

> I won't sell your data and will be very personal with you.

This isn't good enough anymore. You need to promise that my data won't ever _ever_ be sold. Especially since you're asking me to share my diary with you. I'm not sure if this kind of promise can be made though. Maybe we need some legal apparatus you can declare that gives me peace of mind that no future owner of your company can change their mind.