Mobile app design & development · EonTech Poland

Mobile app design and development, one team.

EonTech is a Poland-based mobile app design and development company. Product designers, researchers, iOS engineers, Android engineers, and web developers work inside the same squad. Taste sets direction. Data settles debate. Handover is a conversation, not a PDF.

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  • Design + build, one team
  • iOS · Android · Web
  • Accessible by default

Why this page exists

Design and engineering, priced and delivered as one thing

The awkward truth about most product builds is that design and code are bought separately, and the seam between them is where products go wrong. A design agency ships beautiful Figma files that a development shop half-implements. A mobile app development company ships a working app that never quite matches the intent of the UI/UX design. Money is spent twice, timelines slip, and no one owns the product feel.

EonTech is a Poland-based mobile app design and development company built specifically to close that seam. We field UI/UX designers, product researchers, iOS engineers, Android engineers, and web developers inside the same squad, on the same tokens, in the same review. What you approve in the prototype is what ships to the App Store, Play Store, and the web — down to the focus ring and the reduced-motion state.

The rest of this page is a working guide to what we do, how we work, and how we price it — for CTOs, product leads, and non-technical founders comparing a web design and mobile app development company against a design-only agency, an offshore developer, or a hire-two-vendors approach.

Key benefits

What you get from one design-and-build partner

Six practical reasons EU and UK product teams pick a mobile app development company with in-house UI/UX design over a two-vendor stack.

  • Design and code, one team

    As a mobile app design and development company we run UI/UX designers, iOS engineers, Android engineers, and web developers under one contract. What you approve in the prototype is what ships — no PDF-over-the-wall handovers, no drift between mock and build.

  • Web and mobile from the same shop

    A single web design and mobile app development company managing the whole product surface — shared tokens, shared components, one design system that theme-scales from marketing site to Android to iPad.

  • Nearshore Poland, EU time zone

    Full-day overlap with the UK, EU, and Nordics, half-day with US East Coast. Real-time design reviews and pair sessions during your working hours, not overnight.

  • Accessible by default

    WCAG-aligned contrast, focus order, semantics, and reduced-motion are baked into the first frame, not audited before launch. Compliant products are clearer for everyone.

  • You own the design system

    Figma libraries, tokens, and the code that consumes them are yours from day one. No proprietary handover format, no lock-in when a new agency picks up the file.

  • Evidence over opinion

    Prototypes go in front of real users before code is written. Analytics, session replays, and A/B tests settle debates once features are live — taste sets direction, data settles the arguments.

How we work

From a fuzzy idea to a tested, shipped product

Good design is a loop, not a deliverable. We move from questions to prototypes to evidence, then around again, tightening each pass.

  1. 01

    Product discovery

    We learn the user, the job, and the constraints before sketching a single screen. Assumptions become testable questions and a written brief you sign off on.

  2. 02

    Design system

    Tokens, components, and patterns that scale across web and mobile. One source of truth that designers and engineers share, so the UI stays coherent as it grows.

  3. 03

    Prototype & test

    Interactive prototypes go in front of real users early. We watch where they hesitate and fix the flow before it costs engineering time.

  4. 04

    Design-to-code handover

    Designers and engineers share files, tokens, and a review ritual. Spacing, states, and motion travel from Figma to production without drifting.

  5. 05

    Iterate on data

    Once live, behaviour and analytics guide the next round. We ship in short cycles so we can course-correct while the intent is fresh.

What we do

Craft across the whole surface — mobile, web, and the system between them

  • Mobile UI/UX design

    Native iOS and Android interaction patterns, not just a resized web layout. Gesture models, thumb reach, and platform conventions respected on both sides.

  • Web product design

    Marketing sites, SaaS surfaces, and admin tools built on the same design system as the mobile app. Consistency without copy-paste.

  • Design systems

    Reusable, themeable component libraries with documented tokens. New features ship faster and look like they belong across every platform.

  • Prototyping & user research

    Interactive Figma flows, moderated tests, and rapid iteration. The riskiest hypothesis gets tested first, not last.

  • Accessibility (WCAG 2.2)

    Contrast, focus order, keyboard paths, and screen-reader semantics built in from the first frame. Verified again in the build.

  • Design ops & handover

    Versioned files, clear naming, and a handover ritual that keeps design and code from drifting apart, sprint after sprint.

  • Motion & micro-interactions

    Purposeful motion that guides attention, respects reduced-motion, and never becomes decoration for its own sake.

  • Brand-into-product

    Turning brand guidelines into a working product theme — typography scale, colour system, and voice that survive live product constraints.

Web + mobile, one system

Why a web design and mobile app development company beats two separate vendors

When the same team owns the marketing site, the web app, iOS, and Android, four things go right at once — and none of them show up on a proposal.

  • One design system Shared tokens for colour, type, spacing, motion, and elevation — used by Figma, React/Next, iOS, and Android. Change a token once; every surface updates.
  • Consistent brand feel Users move between your website and your app without noticing the seam. Same voice, same rhythm, same trust signals — front door to logged-in state.
  • Half the review overhead One design review per feature, not one per vendor. No "the web team said yes, mobile team said no" tickets, no re-litigating decisions weekly.
  • Lower long-term cost Two vendors' overheads become one. Discovery, research, and QA carry across web and mobile instead of getting paid for twice.

Industry relevance

Where our design and mobile builds already land

Domain fluency shortens every design decision. These are the buyer shapes we already know — no glossary onboarding, no "explain the workflow" week.

  • Fintech & payments

    Onboarding, KYC, and transaction UX that make regulated products feel calm, not clinical.

  • E-commerce & retail

    Product discovery, checkout, and account surfaces tuned for conversion on both web and mobile.

  • Healthtech

    Clinician-facing tools shaped around real workflows, and patient-facing apps that respect health-anxiety and accessibility needs.

  • SaaS & B2B

    Dashboards, admin surfaces, and settings that reduce support tickets instead of generating them.

  • Logistics & mobility

    Field-worker apps and dispatch consoles designed for one-hand use, poor connectivity, and long shifts.

  • Startups & scale-ups

    First-release product design that survives contact with users — and a design system that can grow without a re-platform.

One team

No handover wall to throw work over

In most setups, design finishes a file and hopes engineering reads it the same way. Spacing drifts, states get missed, and the live product slowly stops matching the intent.

Our designers and engineers share a contract: the same tokens, the same component names, the same review. What you approve in the prototype is what ships, down to the focus ring — on the web app and inside the mobile app.

See our mobile app development practice

Accessibility

Usable by everyone is not a feature you add later

Contrast, focus order, semantics, and reduced-motion respect are design decisions we make in the first frame. An accessible product is a clearer product for everyone, and it keeps you on the right side of standards like WCAG 2.2 and the EU Accessibility Act without a frantic audit before launch.

Working with us

What product teams ask a mobile app design and development company

  • Do you design, or also build what you design?

    Both, in the same team. As a mobile app design and development company we keep designers and iOS/Android/web engineers together, so handover is a conversation, not a hopeful PDF thrown over a wall.

  • Can you work with our existing brand and stack?

    Yes. We adopt your brand tokens and your component framework, then extend them. We do not force a redesign you did not ask for.

  • How do you make sure designs are accessible?

    Accessibility is a design constraint from the start. We check contrast, keyboard paths, and semantics during design, and verify them again in the build against WCAG 2.2 AA.

  • Are you a mobile app development company with in-house UI/UX design?

    Yes. EonTech is a mobile app development company with UI/UX design as a first-class practice — not an outsourced or afterthought layer. Product designers, researchers, iOS engineers, and Android engineers work in the same squad from discovery to launch.

  • Can you cover both the marketing site and the mobile app?

    Yes. As a web design and mobile app development company we handle the whole product surface — marketing site, web app, iOS, and Android — on one design system. That keeps the brand coherent and cuts the cost of every future feature.

  • How is EonTech different from a pure web development company that also does mobile design?

    A web development company that layers on mobile app design usually stitches a mobile team from freelancers per project. Our iOS and Android engineers are permanent, share design reviews with the web team, and use the same tokens — so the app and the site feel like one product, not two.

  • How do you split UI/UX work across iOS, Android, and web?

    One design system with platform-specific overrides. Shared tokens (colour, spacing, type), shared component intent, and per-platform behaviour — iOS follows Apple's HIG, Android follows Material, and web follows your framework's conventions.

  • What deliverables do you hand over?

    Production-ready Figma files with documented tokens and states, a component library that mirrors the codebase, motion specs, accessibility annotations, and — because we build too — the front-end code that consumes it all.

  • Can you run a short discovery or design sprint before we commit to a full build?

    Yes. A two-to-four week discovery is our most common starting shape. We de-risk the vision, ship a testable prototype, and give you a written scope and estimate for the build. No obligation to continue.

  • Do you handle post-launch iteration?

    Yes. Once live, we wire analytics and session replay, review the numbers on a fixed cadence, and ship design and code changes in short cycles. Design is a loop, not a deliverable.

  • Who owns the design files, code, and the design system?

    You do, entirely — Figma libraries, code, tokens, and documentation are yours from the first commit. No proprietary handover format, no lock-in when a new team picks up the file.

  • What team shapes can you field?

    Dedicated pods (designer + PM + engineers), staff-augmentation slots (designers or engineers plug into your team), or full-project outsourcing. Monthly rolling, no multi-year lock-in.

Design meets engineering

Related services at EonTech

Show your users you respect their time

Bring us a rough idea or a tired product. We will run a focused design sprint, prototype the riskiest flow, and put it in front of real users fast — with the same team that will ship the mobile app and the web product afterwards.

Start a design sprint Dedicated teams