What are the most useful apps for all entrepreneurs?

If you haven't, start to use Google Analytics immediately

Trello is my #1 to stay organized and having a team communication app like Slack or MS Teams might be helpfull.

You have to get used to using Trello to keep your work organized.

You should use Buffer. It can make manage your social media. It allows for seamless posting between all social medias. It keeps so organized and saves so much time