Flutter apps are good but from the UI perspective have their own limitations, you essentially rely on premade UI components and if they don’t support a method you need you’re stuck. And I’ve seen some flutters behave weird. I would build a prototype before committing to it.

What about popos?

That’s too bad. I’ve done some open source before but nothing that popular. If someone finds it useful then it can’t be crap.

I know a lot of companies even if using your OSS won’t pay for bug fixes etc. It’s really sad.

What kind of industry or type of solution do those projects solve? That can be a big factor too.

Looks nice