AI-built app review · Fixes · Speed optimization
We review apps built with Lovable, Bolt, v0, Cursor and Claude Code: security, key user flows, speed and SEO. Then we fix what matters, at a fixed price.
Report in 5 business days from access. Fixed price for the fixes. No hourly billing.
What brings you here?
None of these? Describe your problem, and we'll suggest a next step.
Major Polish web portals, where a fast site pays off.
Why a review
AI tools are great at getting an app to “it works on my screen”. Access rules, speed for real users, SEO and monitoring still need an expert's eye.
91%
of 200 publicly deployed apps built with Lovable or Claude Code had at least one security vulnerability.
17%
of Lovable sites with real-user data in Google's Chrome UX Report pass Core Web Vitals on mobile, compared with 53% of all sites in the report.
Sources: Deng, Fan, Meng, “Understanding the (In)Security of Vibe-Coded Applications”, arXiv:2606.23130, preprint, 2026; HTTP Archive and Chrome UX Report, mobile, September 2026.
What we do
You pay for results, not hours. The price doesn't change during the work unless you change the scope.
The finishing touch for apps built with AI: we check yours for bugs, security gaps and slow pages before your users find them.
Diagnosis first, then fixes to your site, store or app. You pay for shipped changes and a before-and-after measurement, not just a report.
Prices for businesses, in USD, excluding VAT. Need something else? Write to us and we'll tell you straight whether we do it.
How we work
Use the form or email us: what you built, which tools you used and what worries you. We reply within 1–2 business days.
We confirm scope, price and start date by email and sign an NDA before we get access. You give us the access the job needs, read-only where possible.
We check your app or site and send a report with a prioritized fix list and a fixed price for the fixes.
You decide what's next: fix it yourself with our list, or we fix it, re-test it and show you the result.
Pricing
Start with a review or a diagnosis. You decide on fixes after you see the report.
AI-Built App Review
Care
$490 / month
Apps up to about 15 screens; bigger apps quoted
You keep building with AI and want an expert to check each change.
Review
Recommended$590
You built an app with AI and want to know if it's ready for real users.
Fix
from $1,500
Fixed price in your review report, before any work
The review found issues and you want them fixed.
Bigger app: more than about 15 screens, several databases or login systems? We'll quote the review after a short description, before you pay. Ask for a quote
Prices for businesses, in USD, excluding VAT. Nothing is charged on this site. We confirm scope and price by email before any payment.
Why FastWebLab
We have more than 10 years of experience building fast websites and web apps, including portals with millions of daily users. We use AI tools every day. They speed up our work, and an expert checks every result. We know first-hand where AI-written code tends to break.
10+
years building fast websites and web apps
Millions
of daily users on portals we've worked on
100/100
this site in Google Lighthouse, mobile and desktop
5
business days from access to your review report
Methods proven under very heavy traffic, applied to your app.
We rely on tests and measurements, not opinions. Speed work starts and ends with a measurement.
You pay for results, not hours. We agree on scope and price before we start, and the price doesn't grow unless the scope does.
We reply within 1–2 business days and work mostly in writing: updates, reports and a video walkthrough of your review.
Not sure where to start? Tell us what's blocking you.
An app you're unsure about, a slow site, a launch date coming up: write to us and within 2–3 business days you'll get a concrete proposal with scope and price. No obligation.
Contact
Tell us what you built and what you need. A few sentences are enough.
kontakt@fastweblab.plDon't see yours? Ask it in the form above.
Read access to the code (GitHub or an export from your AI tool), a staging copy of the app with test accounts and test data, and read-only access to your database and service settings, for example your Supabase project. We check settings and access rules, not your users' data. This access can still show personal data, so we sign a data processing agreement (DPA) before we get it.
No. We check defined areas: access rules, authentication, exposed keys, API endpoints, dependencies and security headers. A penetration test goes deeper and is often expected in compliance audits such as SOC 2 or ISO 27001. If you need one, we can point you to a specialist firm.
Built-in scans look for known patterns, and that helps. They can't know your business rules: who should see which data and what your key flows must do. We check access rules against those rules, test your key user flows and measure speed, with real-user data when Google has it.
Apps built with AI tools such as Lovable, Bolt, v0, Replit, Cursor and Claude Code, usually React or Next.js with Supabase or Firebase. Not sure about your stack? Ask before you order, and we'll tell you straight whether we can review it.
Review: 5 business days from the day you give us access. Speed optimization: Start 7 business days, Standard 15, Premium 30 plus 3 months of monitoring. Diagnosis alone: 5 business days. Fixes after a review: the deadline is in the report. Time you take to reply doesn't count.
Nothing is paid on this site. We confirm scope and price by email, then send an invoice in USD. Review and diagnosis: paid upfront. Fixes after a review: 50% to start, 50% on delivery. Speed packages: the rest after the fixes; in Premium, half of the rest is due when the fixes start. Care: monthly, in advance. Prices exclude VAT. If VAT applies, we add it to the invoice; for businesses in other EU countries with a valid VAT number, the reverse charge applies. We confirm the VAT treatment before we invoice.
No one can honestly guarantee that. We guarantee the scope: every check from the review, done and reported. The report shows what we found on the day of the review. If you order the fixes, we re-test your key flows, and our fixes come with a 30‑day warranty from delivery.
Yes, before we get access to your code. If we may see personal data, for example in your database or admin panel, we also sign a data processing agreement (DPA).
We use it only for your project. We work on it in an isolated virtual machine. When we use AI tools on your code, we use business accounts with a data processing agreement, and their terms don't allow the provider to train AI models on your code. If your policy doesn't allow AI tools, tell us before we start. We delete our copies within 30 days after the work ends and confirm it if you ask. We keep the report and our emails as a record of the work.
We review only apps you own or are authorized to have reviewed. Before we start, you confirm that in writing. We don't scan other people's apps.
In Warsaw, Poland. We work remotely, in English, and mostly in writing: updates, reports and a video walkthrough of your review. We reply within 1–2 business days.