MVP Development for Startups

MVP development means building the smallest version of a product that real users can use and pay for, so you can test the idea on the market before funding the full build. It is for founders and companies with a new product idea who need real feedback first. CompletApp is a Budapest-based product studio that builds MVPs for mobile and web, working in Hungarian and English at a fixed scope and a fixed price.

You get a real, market-ready product in weeks, the version you can put in front of users, charge for, and show investors, instead of spending months and a fortune before you learn anything. We build MVPs that prove the idea fast: tight in scope, solid under the hood, and ready to launch. The point is to get you to real-world signal as quickly as possible, then build on what you learn.

Speed only matters if what you ship actually works. We build MVPs on production-grade foundations, so the version you launch is a genuine product, not a fragile prototype that collapses the moment a real user touches it. You move fast and you launch something you can stand behind.

We build the smallest version of your product that delivers real value and real learning: the core user journey, the screens that matter, the data behind them, and payments when you need to charge from day one. Everything outside that core loop we deliberately leave for later, so your budget goes into validating the idea rather than gold-plating it. Two of ours show where that leads. Copywise, an AI copy generator, started as an MVP we built to validate the idea: it launched on AppSumo, and after rebranding as Persuva it raised $200K in its first investment round in 2024. Books By Experts, a book recommendation app, shipped to both app stores as an MVP, earned revenue from day one through ads and affiliate links, and was later sold on Flippa.

We start from the single question your MVP needs to answer, then build only what is required to answer it convincingly. That discipline is what gets you to launch in weeks instead of quarters.

Fast does not have to mean disposable. We build MVPs with Flutter, React, and Astro on the front, and Firebase or Supabase behind, the same stack we use for full products. A mobile MVP follows the same approach as our cross-platform app development, one codebase for iOS and Android, and its data layer is the same backend development work. So when your idea proves out, you grow from the same codebase instead of paying to rebuild from scratch. The MVP is the first version of the real thing, not a detour.

Launch is the start, not the finish. Once real users are in the product, their behavior tells you what to build next, and we turn that signal into a focused stream of improvements. We can stay on to maintain the product, ship new features, keep it current with OS and platform updates, and help you iterate your way toward product-market fit. You get a partner for the climb after the launch, not just a handoff at the door.

We agree the full scope and a fixed price before we start, so your runway is protected and there are no open-ended bills. We deliver in short, reviewable stages, so you watch the product come together and can adjust as you learn. You get to launch fast with the confidence that what you are shipping is built to last.

Not sure what your scope adds up to yet? Our app development cost calculator turns a feature list into hours and a price range before you book anything.