Kind of useful for business purposes too. I was in this city, I took some cabs and photographed the receipts, I met with these people, I wrote these entries in my notebook (and snapped a picture of the pages) etc. Recap a business trip or even a busy week, get your expenses in order, associate handwritten notes both spatially and temporally with people and projects.

That's kind of cool, TimeHop does something similar already, but it just scrapes the social media accounts you give it.

I dunno that I would pay for this. I'd have to use it for 5 years to get any value out of it (I don't care about what happened last week, I care about what happened past what I can reasonably remember). That's a big ask - to get a user to open your app every day and also pay a subscription.