Please roast my B2B landing page

I like how you formulated your question: "What's missing from my landing page?" - it almost seems like you already know there is something obvious missing from your landing page. And that's colors. It's literally black and white. Even if you want to do a minimal and simple website, you should use colors. The world is not black and white.

Especially when your pitch is "simple and modern", there is nothing modern about looking like a black and white printout.

Anyway, I think the over the fold area looks clean and I think I understand what your product does. I don't like the logo, though. It looks like cheap free clip-art icon.

Some of your bullet point texts end with a period, some don't. This comes off as inconsistent. For example, "Any user can start using the system right away." - ends with a period, "Showing just what you need" - no period. Choose one way and stick with it.

In regards of your main pitch, I have no understanding of your niche but I would like to know why you decided to build this. Did you work years in the industry and realized the software is bad? Tell that story. Not only would it be interesting, it would make this more personal and also tell me that you have some authority and you know what you are talking about.

Also, there are no technical specs anywhere as far as I can see. Is this an app for my mobile phone? Or a web app? What is this, actually? There is no information about this.

I would also like a live demo to see how the app works, assuming it's a web app. Even if the app's data, i.e. the machines, are simulated data, that would still be very useful.

This seems like an interesting niche app that would look very good with some improved UI. You are almost there, all you need is some finishing touches. Good luck!