What Project Management Software do you use? Which Calendar App do you use?

Hello fellow Indie Hackers,

I'm planning on starting my first start-up in the field of project management.
My software is not intended to replace tools like Asana or ClickUp but to enhance them.

So as I plan how to build this software, I wanted to ask you which Project Management App (like Asana, Trello, ClickUp, Azure, etc.) do you use?

And also which calendar app (Google Calendar, Office Outlook, etc.) do you use regularly?

I am really excited for your feedback and which software you are using!

BTW, I started a Newsletter where I will document the steps I will take in the next months building my start-up.

So if you are curious what my product will solve and how I organize and execute everything, fell free to join the Newsletter here: https://sendfox.com/maximilianmuhlenberg