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.