[lelima]

What about day-to-day items, like well engineered wallet or water bottle, it's still engineering but the rigor still can be low, right?

I think even if rigor required it's low you can think of a good solution for a problem, feature or product

[tiznow]

I think that there's probably a difference between "attacking a problem to achieve progress in the utility of something" and just slapping together an app that brings literally nothing new to the table.

Making a birdhouse isn't engineering, creating a new type of dwelling for birds might be.