The app looks cool but I think the big challenge is in demonstrating what makes it unique/better. You spend time comparing with icon managers, but that is not the competition. It would be much more helpful to me in understanding how it differs from the actual competition. And saying that it is the "missing part" or a "huge improvement" doesn't tell me anything factual.
Don't some of the competitors use keyboard triggers? Do they not also allow you to create deep links? Don't some of them also sit in the menu bar? This is why it's not immediately clear to me what specifically makes your product better. I'm assuming you have an answer, but that's where a feature comparison chart would really help.
I assumed ExtraBar was intended to be its own all-in-one solution for executing commands. Now that you say it also works together with other utilities, that changes my perception completely.
Regarding the similar solution, we don't replace them, instead, we make them much more accessible and integrate with them amazingly well. A lot of our users are saying that this app is the missing part for Keyboard Maestery and also a huge improvement for Raycast.
Because everything works with Deeplinks, it's super easy to integrate, and with the keyboard-only navigation options, everything is much faster.
If you have any more questions feel free to ask