Ask HN: What SaaS app should I build?

I am getting pretty good at designing and building React apps, but I'm struggling to come up with interesting and useful project ideas. So I want to ask you guys, do you have some cool app ideas you would like to use, but aren't going to build yourself?

Ideally, I would love to create something useful for indie startup founders, something that would help you to build/launch/market your projects. Although any ideas are welcome =)