From Idea to the App Store in 4 Weeks
We design, build, and ship your iOS & Android app. Fixed price from €6,500. You own 100% of the code — no equity, no lock-in — and you talk directly to the engineers building it.
Not a call person? Email your idea — you'll get a rough scope and fixed quote within 48 hours.
Real Work. Check It Yourself.
No stock screenshots. Companies we've engineered for, apps we've delivered to clients, and products we run ourselves.
Engineering for companies you know
GoStudent
One of Europe's most valuable EdTech companies — online tutoring at scale.
Senior mobile engineering on their Flutter apps.
Praktika.ai
AI language-learning app with avatar tutors, used by millions of learners.
Senior Flutter engineering on the consumer app.
Funda
The Netherlands' largest real-estate platform.
Mobile app development.
Solflare
A leading Solana wallet trusted with real money, every day.
Mobile engineering on the wallet app.
Apps we built for clients
End-to-end builds delivered under the same model you're looking at: scoped, fixed price, shipped to the stores, handed over.
Njuppa
LiveFood-sharing app connecting home cooks with neighbors.
Ludus
LiveA community events platform — create, discover, and join local meetups.
Products we build and run ourselves
We don't just build for clients — we ship our own apps and live with the consequences. That's why your app gets built like we'll be the ones maintaining it.
WonderWay
LiveAI bedtime stories for kids — personalized, narrated, parent-controlled.
AppStorePreview.dev
LiveA web editor for App Store screenshots used by indie devs and studios.
Dinner Done
LiveAI meal planning for busy families — web and mobile.
Stop Renting Time. Start Buying Outcomes.
The Freelancer Roulette
Stop hoping your dev doesn't vanish. You work directly with the engineers building your app — daily updates, no middle layer, and a track record you can verify.
The Agency Bloat
Big agencies quote 6 months and €100k+. We keep the team small and senior, and ship your MVP in one month.
Technical Debt
We don't hack it together. Scalable architecture, clean code, and store-ready CI/CD from day one — built to survive real users and your next funding round.
Your 4-Week Sprint to Market
A proven framework that takes you from concept to App Store, fast.
Discovery & Architecture
Mapping the business goals
We dive deep into your vision, define user flows, and architect a scalable foundation.
Rapid Development
Sprint mode
Our team builds your core features with daily updates and iterative feedback loops.
Polish & QA
Quality assurance
Rigorous testing, bug fixes, and UI refinements to ensure a flawless user experience.
Store Submission
Launch ready
We handle App Store and Google Play submissions, getting you live and ready to scale.
Discovery & Architecture
Mapping the business goals
We dive deep into your vision, define user flows, and architect a scalable foundation.
Rapid Development
Sprint mode
Our team builds your core features with daily updates and iterative feedback loops.
Polish & QA
Quality assurance
Rigorous testing, bug fixes, and UI refinements to ensure a flawless user experience.
Store Submission
Launch ready
We handle App Store and Google Play submissions, getting you live and ready to scale.
Native Performance. Half the Cost.
We utilize Flutter to deploy native apps to iOS and Android simultaneously. One codebase, two markets, zero compromise.
True Native Performance
Flutter compiles to native ARM code for buttery-smooth 60fps animations.
Half the Development Time
One codebase for iOS and Android means faster iterations and lower costs.
Enterprise-Grade Quality
Used by Google, Alibaba, and BMW. Battle-tested at scale.
Future-Proof Architecture
Clean code, proper state management, and scalable patterns from day one.
We're Not for Everyone. On Purpose.
A fixed price only works when the fit is right — so here's the honest checklist before you book a call.
A great fit if…
- You have a clear idea and want it live in weeks, not quarters
- You need iOS and Android without paying for two teams
- You have a budget from €6,500 and want a fixed price, not an hourly meter
- You want to talk to the engineer, not an account manager
- You have an existing backend/API — or need us to stand one up
Not the right fit if…
- You need a large platform with a dozen integrations on an MVP budget
- You're looking for the cheapest possible offshore rate
- You can't spare 2–3 hours a week for feedback and decisions
- You want a team embedded in your org for a year (we ship products, not seats)
One Package. Everything You Need.
No hidden fees. No scope creep. Just a clear path to launch.
The MVP Launch Package
Your complete mobile solution
Fixed price • Fixed timeline • Exact quote within 48h of scoping
100% IP Ownership. Zero Equity Taken.
You own everything we build. No strings attached. No equity requests. Ever.
We run a maximum of 2 builds at a time, so every project gets senior attention.
Prefer email? Send us your idea — fixed quote within 48 hours.
Hi, I'm Darko. I've spent 13 years building software — full-stack first, then native mobile, and the last six years deep in Flutter, engineering apps for companies like GoStudent, Praktika.ai, Funda, and Solflare.
I've seen great ideas die two ways: freelancers who disappear mid-project, and agency contracts that burn the runway before version one ships. AppTube is my answer to both — a small senior team, fixed scope, fixed timeline, fixed price, and you talk to the person actually writing the code.
I also build and run my own apps, so I know what happens after launch. Your app gets built the way I build mine: like the person maintaining it in a year is me.
Let's build something great together.
Questions? We've Got Answers.
Everything you need to know about working with us.
Still have questions?
Let's talk about your project and how we can help you launch.