Can signal handle separate conversations between two people? Wouldn’t want to clutter our texts with a grocery list.

Any tips on a “grocery list” app to replace Keep? Need something that can sync between mine and my wife’s phones - E2EE nice to have but not strictly required.

A lot of the Keep replacements I see posted are just fancy text editors full of markdown formatting junk and I just want a good working checklist that moves checked items away.