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Fixed-price MVP vs AI app builders
Short answer
AI app builders generate a working front end from a prompt in minutes, and for a prototype, a landing page or a demo they are genuinely remarkable value. Where they consistently struggle is the unglamorous production work: correct payment webhooks, data integrity, authentication edge cases, security, and debugging when the generated code stops making sense. A fixed-price build uses the same AI assistance but with a developer accountable for the result being correct. Choose an AI builder if you enjoy the process and can debug what it produces. Choose fixed-price if you need it to actually work when a stranger pays you money.
Side by side
| Factor | AI app builders like Lovable, Replit and v0 | Launch My MVP |
|---|---|---|
| Cost | $20–$100+/month, usage-dependent | $3,500 AUD fixed, once |
| Time to something visible | Minutes | 48 hours to something finished |
| Who debugs it | You, with the AI's help | Us, and it is covered for 7 days |
| Security review | None by default | Keys server-side, verified webhooks, database constraints |
| Accountable for correctness | Nobody | One named developer |
| Best suited to | Prototypes, demos, simple tools, learning | Products that take real money from real users |
The case for AI app builders like Lovable, Replit and v0
Speed to something on screen is extraordinary, and the cost is a monthly subscription rather than a project fee.
For prototypes, internal demos, pitch visuals and simple tools, the output is often entirely sufficient.
You keep full control and can iterate at any hour without booking anyone's time.
They have made real software genuinely accessible to non-developers, and that is a good thing.
Where AI app builders like Lovable, Replit and v0 tends to go wrong
- The last 20% is where projects stall: auth edge cases, webhook reliability, race conditions, migrations, and security. The generator does not know it got these wrong.
- Security defaults are the recurring failure. Exposed API keys and database rules that let any user read any record are common in generated apps, and you will not notice until someone does.
- When generated code breaks in a way the model cannot fix, the founder is stuck holding a codebase they cannot read.
- Cost is unpredictable in practice — a long debugging session can consume a surprising amount of credit.
- Nobody is accountable. If the payment flow silently drops orders, that is your problem to discover.
The case for a fixed-price build
The same AI assistance is used here — that is precisely why 48 hours is possible — but with someone who reviews the output and is answerable for it.
The parts that quietly lose you money get built properly: verified Stripe webhooks, server-side API keys, database constraints rather than hopeful checks in the code.
You get a real handover: the repository, the deployment, and a walkthrough of how it works.
A fixed price and a fixed date, rather than an open-ended subscription and an open-ended weekend.
Choose AI app builders like Lovable, Replit and v0 if
- You are building a prototype or a demo rather than something people will pay for yet.
- You are technical enough, or curious enough, to read and fix what it generates.
- You want to iterate constantly and hands-on, which is a completely valid way to build.
- Your budget is a monthly subscription rather than a project fee.
Choose a fixed-price build if
- Real money or real customer data will pass through the product.
- You have already generated something and cannot get the last 20% working.
- You want one person accountable for it being correct, not just present.