Is there a need for a PMDD App?

Hi all,

I am a female software developer who is also suffering from PMDD. I am currently writing an app for myself to track my symptoms, etc. I am not really satisfied with the apps that are currently on the market and I also don't want to pay for them as I can write them by myself ^^
May I ask you, if you are all happy with the tools you are using? Or do you have any features that you are missing? What would you love that the app would do, that you currently don't have?
Maybe I can build something that's not only for me useful.