Ask HN: Week product MVPs you would like to see?

I am having some months off and I am looking for some probable 1 week product mvp ideas to build.

My own list is too slim;

An offline browser bookmark search index.

A bicycle mail/package delivery service product.

A calculator for possible truck goods packaging.

A service/product which enables orgs to measure and receive feedback on a multi day per week level for whatever team/individual.

Do you have anything I could help build which makes sense to you?