An AI app builder turns a plain-English prompt — "a habit tracker with reminders," "a SaaS dashboard," "a marketplace" — into a working app it writes, runs, and lets you ship. The category exploded in 2025–2026 under the banner of "vibe coding": building software by describing the vibe and letting AI handle the syntax. But these tools are not all the same — some only do web, some only do UI components, and only a couple build mobile apps. Here's how the six leading options compare, including where GenVibe (yes, the platform you're reading this on) loses, not just where it wins.
The short version
- Lovable — best for polished web apps; web-only, Figma is paid.
- Bolt.new — best for developers who want in-browser control; does web and Expo mobile.
- v0 by Vercel — best for React/Next.js UI inside the Vercel ecosystem.
- Replit — best for full-stack apps with hosting built in.
- Base44 — best for internal tools with lots of built-in integrations.
- GenVibe — best for building web and mobile apps in one tool, with free Figma import at the lowest paid price.
Side-by-side comparison
| Tool | Free tier | Paid from | Native mobile | Figma import | Best for |
|---|---|---|---|---|---|
| Lovable | ~5 credits/day | ~$25/mo | No | Paid only | Polished web apps |
| Bolt.new | 1M tokens/mo | $25/mo | Yes (Expo) | Yes | Developers, in-browser control |
| v0 (Vercel) | $5 credits/mo | $20/mo | No | Yes (paid) | React / Next.js UI |
| Replit | Starter (limited) | $25/mo | No* | No | Full-stack + cloud hosting |
| Base44 | ~5 messages/day | ~$20/mo | No | No | Internal tools + integrations |
| GenVibe | 25 credits, no card | $12/mo | Yes (Expo, free) | Yes (free) | Web + mobile, free Figma, low cost |
*Replit can target mobile via web/PWA workflows but doesn't generate native React Native projects the way a mobile-first builder does. Pricing is current as of June 2026 and changes often — check each tool's pricing page before committing.
How we compared them
We weighted four things a real builder cares about: what you can actually ship (web only, or mobile too), the free tier (can you build something real before paying?), price to go further, and lock-in (do you own and export the code?).
The 6 best AI app builders
1. Lovable — the popular all-rounder
Lovable is probably the most recognized name in vibe coding, and it earns it: the apps it generates look clean out of the box and the chat-to-build loop is smooth. It's web-focused (React), with a free tier of a few credits a day and paid plans from about $25/month.
Best for: non-technical founders who want a good-looking web app fast. Watch out: the free tier is a trial, not a shipping plan (apps live on a lovable.app subdomain until you pay), Figma import is gated behind paid plans, and there's no native mobile output.
2. Bolt.new — most control, in the browser
Built by StackBlitz on WebContainers, Bolt runs a full dev environment in your browser and gives developers real control over the code. It scaffolds both web and React Native + Expo mobile projects. The free plan is token-metered (1M tokens/month, no card); Pro is $25/month for 10M tokens.
Best for: developers who want to see and steer the code. Watch out: token burn is real on bigger apps, free tokens don't roll over, and the default styling is plainer than Lovable's.
3. v0 by Vercel — the UI specialist
v0 is the best in this list at generating beautiful React/Next.js interfaces, and it now produces fuller projects rather than just snippets. Free gives you $5 of monthly credits; Premium is $20/month and unlocks Figma imports and the v0 API. It's deeply tied to the Vercel ecosystem.
Best for: React developers building UI inside the Vercel/Next.js world. Watch out: it's UI-and-frontend-centric, not a full mobile or backend builder, and the free credit allowance is small.
4. Replit — full-stack with hosting built in
Replit's Agent can scaffold a full-stack app — frontend, backend, database, deploy — and crucially it hosts the result in Replit's cloud, so there's no separate deploy step. The free Starter is limited; Core is $25/month with usage credits, and pricing is effort-based (a small change costs little, a big scaffold costs more).
Best for: people who want one place to build and run a full-stack app. Watch out: effort-based credits make costs hard to predict, and it's web/PWA rather than native mobile.
5. Base44 — built-in integrations for internal tools
Base44 leans into integrations — auth, file uploads, email, SMS, image generation — so it's strong for internal tools and data apps. The free plan gives a few messages a day with all integration types; paid starts around $20/month.
Best for: internal business tools that need lots of integrations wired up. Watch out: the dual-credit system (build + run) gets confusing, message-metered building is restrictive on free, and it's web-only.
6. GenVibe — web and mobile in one, free Figma, lowest cost
GenVibe builds full web apps and websites from a prompt — React, Vue, Svelte, and Angular, with a Supabase backend — exactly like the others here. What sets it apart is that it does that and generates native React Native + Expo mobile apps, plus Figma import and screenshot-to-code, all included in the free tier (25 one-time credits, no credit card). You get a live in-browser preview, full source export, and one-click deploy to Vercel or Netlify. Paid plans start at $12/month — the cheapest entry point here — up to $99/month for heavy use.
Best for: makers who want one tool for both web and mobile apps, anyone converting a Figma design, and anyone who wants the lowest paid entry price. Watch out (honestly): it's the youngest tool here, with a smaller community and fewer built-in integrations than Base44 or Replit; its free credits are one-time rather than a recurring daily/monthly grant; and the backend path is Supabase rather than built-in cloud hosting like Replit. Bolt.new also does Expo mobile — there GenVibe's edge is price and free Figma import, not mobile alone.
Which should you pick?
- Building a mobile app? GenVibe or Bolt.new (both scaffold React Native + Expo). GenVibe is cheaper and includes Figma import free; Lovable, v0, Replit and Base44 don't generate native mobile.
- Converting a Figma design? GenVibe (free) or v0 (paid).
- Want the most polished web UI? Lovable or v0.
- A developer who wants control? Bolt.new.
- Need it hosted and full-stack in one place? Replit.
- Internal tool with lots of integrations? Base44.
- On a tight budget? GenVibe's $12/month is the lowest paid tier; the others start at $20–25.
The honest takeaway: there's no single "best" — there's a best for what you're building. If that's a web or mobile app, a Figma conversion, or the cheapest way in, start with GenVibe. If it's a polished web product with a big community behind it, Lovable or Bolt are safe bets.
FAQ
What is the best free AI app builder?
For building something real for free, GenVibe stands out because its free tier includes mobile and Figma with no credit card. Bolt.new's 1M free tokens/month also go a long way for web and Expo apps. Most others (Lovable, v0, Base44) offer free tiers meant for trial rather than shipping.
Which AI app builder makes mobile apps?
GenVibe and Bolt.new both generate React Native + Expo apps for iOS and Android (store builds are done off-platform via Expo/EAS). Lovable, v0, Replit and Base44 are web-first; some can produce a mobile-friendly web app or PWA, which isn't the same as a native app.
Do I own the code these tools generate?
Mostly yes — Lovable, Bolt, Replit, and GenVibe let you export or push the full project to GitHub. v0's free output is more component-oriented. Always check export terms before you commit.
What is vibe coding?
Vibe coding means building software by describing what you want in plain language and letting AI write and run the code, instead of typing it line by line. Every tool in this list is a vibe coding tool.
Try GenVibe free
Want to compare for yourself? The GenVibe free tier is the easiest place to start — no credit card, just paste a prompt, a Figma URL, or a screenshot. For a deeper head-to-head, read Lovable vs Bolt.new vs GenVibe.