VIBE-CODED MVP FIX · AUDIT €5,000 · FIX €25-75K · 2-6 WEEKS
Your vibecoded app proved people want it. Now let's make it safe to rely on.
We take the product you validated in Lovable, Bolt, Replit, or Cursor and build the version that holds paying customers. Security, data, tests, infrastructure — in weeks.
2-minute form. Miro (our delivery lead) or David replies within 1 business day — with real questions, not a sales sequence.
Prefer to talk first?
Three commitments before you spend a euro
You pay 30% to start
The other 70% when the product is fully functional — defined in writing before we begin.
Audit first, verdict honest
If rebuilding beats fixing — or we're not the fit — the report says so. Yours to keep either way.
You own everything from day one
Code, docs, infra access. Walk away anytime with all of it.
It does 90% of what you want.Here's what the missing 10% actually is.
The 90% is real. The screens work, people get it. You validated a product for the cost of a few evenings — and all of that survives.
The missing 10% is what no demo shows: authentication that actually authenticates, a database that keeps its contents to itself, backups, an architecture that survives its second concurrent user. That layer was never built — and it's most of the engineering.
| Aspect | What you have | What customers need |
|---|---|---|
| Proves | People want this | People can rely on this |
| Security | Whatever the tool generated | Designed, reviewed, tested |
| Data | Works until it doesn't | Protected, backed up, recoverable |
| Failure at 2 AM | Nobody knows the code | Monitored, debuggable, on-call ready |
| Built by | Anyone with an idea | Someone who understands infra |
The record backs this up. One 2025 disclosure (CVE-2025-48757) caught Lovable-generated apps shipping without row-level security — 170+ production apps exposed. Veracode found AI models pick the insecure implementation in 43% of tasks. Those founders weren't careless. They shipped what looked done.
Read the full argument: Vibe coding got you an MVP. Now what? →Two ways people end up here
You vibecoded a product — and now there's real demand
The demo landed. Signups, maybe first revenue. And a quiet thought you keep postponing: you can't put paying customers' data on this thing. That instinct is correct — it's the qualification.
You vibecoded an internal app — and now your team runs on it
You built the ops tool yourself, and it worked so well the whole team depends on it. Company data lives in it. Nobody can maintain it or say whether it's secure. Same fix: keep what works, engineer what's underneath.
- You haven't built anything yet — start with our development services.
- You want more vibe-coded features on the same foundation — the one path we won't take your money for.
- You expect production engineering at the price of AI credits.
What you get
Phase 1 - The audit
€5,000 flat- A fixed quote for Phase 2
- A written report that's yours - use it with us or any team
- Security, data, architecture and dependency scan of your app and source
- An honest verdict: what's salvageable, what gets rebuilt, why
Phase 2 - The fix
from €25,000 · quoted exactly at the verdict- The missing features - the 10% you know about, plus what the audit found
- Security designed and reviewed, not generated
- Test coverage - changes stop breaking things you didn't touch
- Staging and a safe deploy path - no more coin-flip releases
- Monitoring and backups - the layer that answers at 2 AM
- Handover docs, full ownership
Weeks rather than quarters
Tell us about your app
The 2-minute form below, or a 30-min consultation if you'd rather talk first.
Reply in 1 business day
Miro or David, with questions specific to your app.
Audit → verdict
We get access, we dig in, you get the verdict and a fixed Phase 2 quote.
The fix
30% to start, delivery in 2-6 weeks. 70% when it's fully functional.
Where this judgment comes from
Honest version: nobody has a decade of vibecoded-app rescues — the tools are barely two years old. What we do have is a business built since 2008 on taking over software other teams couldn't finish, fix, or keep alive. The pattern is the same; the code generator changed.
Tentacles IoT
-50% dev costs
Half-done apps after a failed supplier build. We finished the back office, rebuilt the mobile app in Flutter. Dev costs down 50%, with us since 2019.
“GrownApps has a truly broad development specialization.”
Jeff van den Berg, CEO, Tentacles IoT
QuantPedia
+300% subscriptions
Stuck on legacy .NET. We rebuilt it without losing the business running on it: subscriptions up 300%, zero security incidents in 2+ years.
Pricing
€5,000
The audit. Flat, and the report is yours.
€25-75k
The fix. Quoted exactly after the audit.
Terms: 30% at start, 70% on delivery of a fully functional product.
And the audit pays for itself: continue to Phase 2 with us, and the €5,000 is credited to the build.
For scale
- A from-scratch rewrite elsewhere is still quoted as a multi-month, six-figure project.
- An accelerated delivery on a proper foundation is what moves our number down — and your validated product decisions come along.
A note from David
I'll be honest: in autumn 2023 I thought vibe coding might end our MVP business. Instead it handed founders the cheapest demand-validation tool this industry has produced. What it doesn't produce is a product — I wrote a whole article about that gap.
You did the hard part: you proved people want the thing. The rest is engineering — and after 20+ years of taking over other people's codebases, that's the part my team is unreasonably comfortable with.
David Melich — CEO, GrownApps. Building and rescuing software since 2003, teaching web development at UPJŠ.
Before you book
- Do I have to throw my app away?
- The audit tells you, honestly. Either way, nothing you validated is lost — your app becomes the spec, and every screen and product decision carries into the production build. The code was the cheapest part of what you made.
- Why does the 'last 10%' cost €25,000+?
- It's 10% of the product but most of the engineering: security, data integrity, tests, infrastructure. The 90% was cheap precisely because that layer was skipped.
- Can't I just prompt the AI to fix it?
- That's how it got here. Models pick the insecure option in a large share of security-relevant tasks, and with no reviewer, every fix compounds the last one. We use AI too — with a senior making the calls.
- Is my data at risk right now?
- Honestly, we don't know until we look. Public incidents of AI-built apps exposing their databases keep showing the same thing: the failure is invisible from the UI. If real user data is in the app today, the audit answers this first.
- What if the audit says 'rebuild from scratch'?
- Then the report says so, with reasoning and a quote you can take to any team — ours included. We'd rather lose Phase 2 than win it on a fix we don't believe in.
- Who actually does the work?
- A senior team — the same people who read your intake. Part of the work runs through our AI pipeline; every architecture and security call is made by a senior. No juniors learning on your codebase.
- My app is internal, no customers — does this still apply?
- Yes — often with more exposure, not less: company data, zero security review, one person who understands it. Same audit, same fix, usually a smaller scope.
- What does 'fully functional' mean for the 70%?
- Defined together before we start: everything your validated app did, plus the agreed gap list, in production, security verified. Written down, attached to the quote. No vibes-based acceptance.
- What happens after delivery?
- You own everything and can walk away clean. Most clients keep us for the roadmap, but the handover docs mean you don't have to.
Your app did its job.Now build the product.
You validated demand before spending real money — the round most founders lose.The next round is won with engineering.
Tell us what you built
Takes about 2 minutes. Everything here makes the first reply sharper — nothing is used for anything else.
We use this only to scope your fix. Privacy policy. NDA available before any code access.
Or just email David directly: david@grownapps.io
Not ready yet? Read the full argument or subscribe to The Hard Ship — we write about exactly this.