Should i stop a 9-5 job to make a solo iOS startup？

I’d say try to manage both at first. If you are really passionate about your idea, try to at first manage both and then if you see success, leave your 9-5. It’s nice to have a steady salary to fall back into. Ultimately if you love what your startup will do, the time you spend on it after your day job should not seem like work.

Sounds good but I think your safest bet is to start the solo project as a side-hustle until you create a consistent revenue stream off the solo project Good luck!

I have 8+ years’ iOS developer work experience for 9-5 job，what's more，i have released sevaral apps on App Store for my independent development and have thousands of users.

Passion and Commitment + Financial Stability, take these 2 factors under consideration.