I am building an app helping couples share their mental load equally and need your help

If there was an app to help couples share mental load equally what features should it have apart from being a really good todo list?

I am currently working on an app and already have a lot of features built that in my opionion will help couples keep track of mental load and distribute it equally between both partners. But i'm sure there are a lot of great ideas in this subreddit so please feel free to tell me what would help you the most.

I am not trying to promote anything here so i won't post links or the name of the app.

Thanks in advance