AI App Builder Comparison 2026: Lovable, Base44, Bolt, Replit, v0

Five names come up in almost every conversation about prompt-based app building: Lovable, Base44, Bolt, Replit and v0. They look similar from the outside, since you type a description and an app appears, but they were shaped by different ideas about who the user is and what to hand over. This guide compares them by approach rather than by feature list, because features change monthly. Check each vendor's current documentation and pricing before you decide.

Positioning at a glance

Treat this as a starting hypothesis for your own testing, not a ranking.

Seven questions that decide the choice

1. Who builds? A non-technical founder needs different support than an engineer who wants speed.
2. What are you building? A marketing site, an internal tool and a marketplace stress different parts of a tool.
3. Where does the data live? Know who controls the database and where it is hosted, which matters for GDPR.
4. Can you export? Full source access in a repository you own is your insurance.
5. How does it handle logins and permissions? This is where prototypes are weakest.
6. How do you collaborate with developers? A tool that hides code makes handover harder.
7. How will you reach mobile? Store delivery needs a plan from day one.

The shared limits

All five tools produce output that reflects how well you described the task. All five tend to underinvest in things that do not show in a demo: access control, input validation, error handling, performance on slow networks, accessibility and tests. None of them will submit your app to Apple or Google for you with a human accountable for the result. That is not criticism; it is the boundary between prototype tooling and production engineering. Our AI-generated code audit guide describes how to close that gap.

Running your own comparison

• Pick one real, small feature set from your product.
• Build it in two or three tools using the same written spec.
• Count correction rounds and time to something you would show a customer.
• Inspect the code or underlying configuration with a developer.
• Try exporting, and try to run the result elsewhere.

For head-to-head views, see Lovable vs. Base44 and Lovable vs. Bolt, plus our notes on Replit Agent and v0 to production.

Mistakes to avoid when choosing

• Choosing by social media demos rather than by a test with your own requirements.
• Ignoring who will maintain the app after launch.
• Assuming the builder will handle security, accessibility and GDPR automatically.
• Putting real customer data into a prototype environment that was never reviewed.

From prototype to App Store and Google Play

Whichever builder you choose, you end up with a web app. Reaching the stores needs native packaging, signing, listings, privacy declarations and real mobile value. Apple's App Store Review Guideline 4.2 on minimum functionality is a reason not to ship a bare wrapper, and Google Play has its own testing and policy requirements for new developer accounts. Verify current rules before planning your launch.

How apprat.io fits in

apprat.io offers app builder modules for Website-to-App, Lovable-to-App, Base44-to-App, Claude Code-to-App and Codex-to-App, plus push notifications and store publishing assistance. Behind them, senior AI Code Engineers review the code, test on real devices and are accountable for what ships, within ISO 9001 and ISO 27001 certified processes. Plans start from €129/month with a free 30-day trial; see features and pricing. If you are unsure where your project stands, book a call for free.

Our recommendation

Choose the tool that lets you validate quickly while keeping an exit open. Own your code, plan for review and treat the builder as the first step, not the last.