Oh yeah, I get it. On iOS I use a simple database app called Collections that I really like, I use it for mileage tracking and certain kinds of journaling or lists that need extra features like a relational key or lookups or sketch or calculation fields etc. When I can’t find an app that does what I want.

Basically a simple roll-yer-own approach. I haven’t looked into sharing the data dynamically, though. I think Collections is iOS only, probably similar apps galore on android. https://collectionsdb.com/