I've seen a couple tools pop up around this idea. Haven't explored them much, but:

- MonicaHQ (open-source)

- Dex (free version seems good enough for most people, i'm trying this one out rn) getdex.com/

- Custom system in Airtable - https://news.ycombinator.com/item?id=30329475

- Infrequent app - blog post talks more about it, linked in comments - https://news.ycombinator.com/item?id=33308084