Service

Mobile & Web App Development

A mobile app only succeeds when it solves a real problem for real users — and survives contact with app store review, device fragmentation and real-world networks. Beautiful mockups are the easy part.

We design, build and publish applications that solve real problems — native iOS and Android, cross-platform with Flutter, or progressive web apps. Secure, scalable and ready to grow with your business.

Challenges we solve

An idea without a technical plan

You know what to build, but not which platform, stack or budget it really takes — and agencies quote numbers that do not add up.

Apps users abandon

Slow onboarding, clunky flows and crashes push users away within days — and app stores punish bad ratings forever.

Disconnected from your business

A mobile app that lives apart from your CRM, payments and back-office is a dead end: users see one world, your data sees another.

How we help

  • Custom applications designed around your workflows and goals — not templates
  • Advanced security: encryption and modern standards for your users’ data
  • Third-party integrations: payments, CRMs, ERPs, APIs and more
  • Full cycle: design, development, publishing and post-launch updates
  • Cross-platform efficiency with Flutter when it fits your budget and timeline

What we build

  • Native Android apps with Kotlin for performance and device access
  • Native iOS apps with Swift, optimized for iPhone and iPad
  • Cross-platform apps with Flutter — one codebase, faster delivery
  • Progressive web apps for instant reach without app stores

Why ESTET

EU-based, GDPR compliant

Team in Poland, European Union. Contracts and invoices in EUR, development practices aligned with GDPR.

Transparent process

Clear estimates, regular demos and honest timelines. You always know what we are working on and why.

Build to scale

Architecture designed for your growth — from the first users to the loads of a mature business.

Let's talk

Ready to build software that actually works for your business?

Let's discuss your project. No commitment required.