Tread carefully. If you’re going to do this, read your current employment agreement carefully especially the parts about Intellectual Property. Every medium-to-large company I have worked at has asserted ownership of everything I build, at work or away from work, using my own equipment, on my own time—it doesn't matter. If your employer can imagne a conflict of interest (for example could what you are working on pote…
There's a ton of shitty legal advice in this subthread (NOT this first comment, which at the core "read your agreement" is pretty good advice). Ignore the people downthread who are making specific assertions about what is and isn't enforceable in what state. Rather, follow the advice that sensible people always give in this situation: !!!!! If there is serious money at stake, or a reasonable prospect of serious money…
It would be foolish to think you can run a business without legal protection.
That shouldn't prevent one from chasing their dreams though. I think OP's message paint a darker than necessary paint regarding this.
(Source Currently doing this with a lawyer as a cofounder)