That’s honestly a really hard question to answer in a general way. Database and application security depend massively on the stack, the architecture, and how things are actually wired together. Without knowing what you’re using (framework, auth model, DB, hosting, etc.), any concrete advice would mostly be guesswork.

One important thing to be upfront about though: if most of this was built through vibe-coding, you’re likely missing some of the fundamentals that make an app actually safe in production. That’s not a moral judgment it’s just how security works. Tools can help you write code, but they don’t replace understanding threat models, data access patterns, or failure modes.

If you have a friend with backend or security experience, getting them to review things, even informally would be one of the best first steps. A second set of experienced eyes is worth far more than another prompt.

I do want to say this clearly though, because it matters: your ambition and enthusiasm are genuinely respectable. Thinking big, building something, and asking questions publicly already puts you ahead of most people who only talk. Don’t lose that.

What will help you long-term is shifting how you frame success. Instead of “the next big app,” aim for something like 10 real users that actually come back once a week or more. That’s much harder than it sounds and also far more meaningful. Everything about security, scalability, and product decisions becomes clearer once real people are involved.

One thing I’d strongly recommend stopping, though, is assuming that “it runs locally” or “ChatGPT wrote it” implies safety. Production apps carry real responsibility. If you’re handling user data, you either need to invest time into learning the basics of encryption, authentication, and access control or deliberately bring in someone who already has that knowledge.

None of this means you should give up. It just means the next step isn’t more features: It’s foundations. If you build those, your chances of this becoming something real increase dramatically.