Deadline with penalty clause
The delivery date is a contractual obligation with financial consequences — not a marketing promise. Every day of delay on our side = partial refund.
/services/web-mobile // engineering-grade
From marketing sites
to marketplace apps.
QA10 is a software house — not a marketing agency. We design and ship production-grade websites and native-quality mobile apps with business logic, integrations, and technical SEO baked in. Full code ownership from day one.
Technology partners
Key numbers
fastest web delivery
code ownership from day 1
iOS + Android — one codebase
Lighthouse score guaranteed
/web-mobile/why-qa10 // software house vs agency
Why QA10, not a typical agency.
Full ownership from day 1
Code, domain, server, store accounts — everything on your accounts. Git repo transferred on delivery day. Switch vendors tomorrow without asking.
Lighthouse 90+ guaranteed
You get a Google Lighthouse report on launch day. LCP <2.5s, Performance 90+. If not — we go back to work at no extra cost.
One codebase, two platforms
Mobile apps ship to iOS and Android from a single TypeScript codebase. Native performance, shared logic, half the maintenance cost.
/web-mobile/portfolio // shipped products
Built and deployed.
/web-mobile/comparison
What you won't get from a typical agency.
| Criterion | Typical agency | Freelancer | QA10 |
|---|---|---|---|
| Deadline | 2-4 weeks (no consequences) | When they finish | In contract with penalty |
| Code ownership | Usually (no document) | Yes | Git repo + accounts on delivery day |
| Post-launch SLA | Email (no SLA) | None | 24h response for 3 months included |
| Performance | Fast (no numbers) | Fast (no numbers) | Lighthouse 90+ or we rework |
| Mobile apps | Outsourced / not offered | Web only | Native iOS + Android in-house |
| Pricing | Net (+23% VAT surprise) | Net (+23% VAT) | Gross — what you see is what you pay |
/web-mobile/packages/web // three tiers
Web — choose your package.
1,500-3,000 PLN
Business card or landing — fast and solid
14 days
- Landing page or business card site
- Up to 5 pages
- CMS — edit without a developer
- Responsive (mobile-first)
- Deployed on Vercel
- On-page SEO basics
3,000-6,000 PLN
Company website with blog and integrations
21 days
- Company site with blog/news
- Forms, maps, social integrations
- On-page + technical SEO
- CMS (Decap or Keystatic)
- Analytics (Plausible)
- Core Web Vitals optimization
6,000-10,000 PLN
Platform with advanced functionality
30-45 days
- E-commerce, bookings, or client portal
- API integrations (payments, CRM, ERP)
- Up to 30 pages + dynamic routes
- i18n included (2 languages)
- Advanced SEO + schema.org
- Performance tests + WCAG audit
/web-mobile/packages/mobile // Expo + React Native
Mobile — native apps, one codebase.
Built with Expo and React Native. Ship to iOS and Android simultaneously. OTA updates let you push fixes without waiting for store review.
14,000-26,000 PLN
Validate your idea with a real product
3-4 weeks
- iOS + Android from one codebase
- Up to 8 screens
- Authentication + user profiles
- Backend (PocketBase or Supabase)
- Push notifications
- App Store + Google Play submission
26,000-61,000 PLN
Full-featured app for scaling businesses
5-8 weeks
- Up to 20 screens + navigation tabs
- Payments (Stripe / native in-app)
- Real-time chat or notifications
- Admin panel (web dashboard)
- OTA updates (ship fixes without store review)
- Analytics + crash reporting
61,000-140,000+ PLN
Platform-grade mobile experience
10-16 weeks
- Marketplace / multi-tenant architecture
- Offline-first with sync engine
- Custom animations + premium UX
- CI/CD pipeline + automated testing
- White-label capability
- Dedicated support + SLA
/web-mobile/process // brief to deploy
Four steps to a shipped product.
- scope
Brief
We discuss goals, audience, competition, and the business outcome. Result: a brief with scope and a priced package.
- mockup
UI Design
Wireframes then high-fidelity mockups. You approve the design before a line of code is written.
- repo
Development
Astro + React (web) or Expo + React Native (mobile). GitHub repo from day one. Preview after every sprint.
- live
Deploy + Handover
Production on Vercel (web) or App Store + Google Play (mobile). CMS training, documentation, full access. 30 days of free fixes.
/web-mobile/tech // deliberate choices
Technologies we choose deliberately.
- Astro Static Sites
Zero JS in production where unnecessary — fastest LCP in the static site class. Perfect for SEO-driven pages.
- Next.js Web Apps
Full-stack TypeScript with tRPC, Drizzle ORM, and edge functions. Auth, database, API — one repo.
- Expo Mobile Apps
React Native with managed workflow. One TypeScript codebase for iOS + Android. OTA updates without store review.
- React Native Native UI
Native components. One TypeScript codebase for iOS and Android.
- PocketBase Backend
Real-time database + auth + file storage in a single binary. Self-hosted. No vendor lock-in.
- Vercel Hosting
Edge network, automatic HTTPS, preview per branch. We do not run a DevOps desk for the site.
- Tailwind Styling
Utility-first CSS with QA10 Design Tokens — consistent system, zero CSS bloat. NativeWind for mobile parity.
/web-mobile/faq // questions and answers
Frequently asked questions.
Do I get full source code ownership?
Yes — from day one. GitHub repo transferred to your account or our org with full admin access. No vendor lock-in, no retained dependencies. You can switch providers tomorrow without asking permission.
Can I edit content myself?
Yes — Business and Premium tiers include a CMS (Decap or Keystatic). Edit text and images without a developer. Start tier: editing via simple Markdown files or optional CMS add-on.
What if I need changes after delivery?
First 30 days: fixes are free. After that — one-off quote or QCare Lite subscription (1,800 PLN/mo) with full technical support and SLA.
How does the mobile app development process work?
Same 4-step process as web: brief, UI design, development (Expo + React Native), deploy (App Store + Google Play). You get preview builds via EAS after every sprint — test on your real device before launch.
Can I have one codebase for iOS and Android?
Yes. Expo and React Native. One TypeScript codebase for iOS and Android.
What guarantees do I have on the deadline?
The contract includes milestones with a penalty clause for delays on our end. Same approach as QDeployment and QCare — a contractual obligation, not a verbal promise.
Do you publish apps to the stores?
Yes — App Store and Google Play submission is included in every mobile package. We handle certificates, screenshots, metadata, and the review process. You own the developer accounts.
/web-mobile/contact // quote in 24h
Tell us what you need.
We quote within 24 hours.
You don't need a finished brief. A short description of the goal and target audience is enough — we'll extract the rest during the call.
Start a project