Build an app

Lovable generates the interface and code, adds a database and login, and hosts the finished app, so you can put a working product in front of customers. Founders use it to test an idea before hiring a developer. As the app grows, someone with coding skills helps with security reviews and edge cases. Treat the first version as a fast way to learn what customers want.

v0 states that the code is yours to keep and extend. Bolt lets you open the generated code and edit it yourself, and Replit gives you a full workspace around your project. Check each tool's terms for export options before you build anything large. Keeping a copy in your own repository protects you if you switch later.

Lovable, Bolt, Replit and v0 all have a free plan, enough to test an idea as a working app. Free plans limit how many prompts or how much usage you get, so a busy build day hits the ceiling fast. Plan the screens and data you need before you start prompting. Pay once you know which builder fits how you work.

Lovable and Replit take you furthest without code: Lovable from a plain-language description, Replit through an agent that plans, writes and deploys. Bolt also works from a prompt and suits you if you may want to edit code later. v0 leans towards developers and designers who want a real React codebase. Try the same small idea in two of them and keep the one whose result you understand.

The builder writes the code, but you remain responsible for how customer data is stored and protected. Check where your app's database and hosting run, and sign a data processing agreement with each provider. Ask the builder to add login and access rules before you collect any personal data. Have a developer review the app before real customers sign up.