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Custom mobile & web software · Gdańsk, Poland

APP4YOU.DEV is a custom software studio from Gdańsk, Poland. We design and build digital products end-to-end — mobile apps, web platforms, and dedicated software systems — from concept and UX through deployment and long-term development. On mobile we work with both Flutter and React Native, choosing the right tool for the product rather than forcing one framework. On web we build with React and other modern stacks, and we deliver bespoke software wherever off-the-shelf doesn't fit. We also build our own products — including a consumer SaaS for AI-assisted home design — so we approach client work with a product mindset, not just task delivery. We have particular experience in healthtech and digital tools for the public and SME sectors, including work delivered as an accredited Business Environment Institution (IOB) under Poland's SPEKTRUM 2030 innovation-support

  • Min project size
    $10,000+
  • Hourly rate
    $50 - $99 / hr
  • Employees
    2 - 9
  • Year founded
    Founded 2021

Overview by:

Reviewer avatar
Wiktor Słomiński
Member of the Board, Business & Operations About the Team

Select Focus Area
Application Platforms
Azure Platform
20%
Other app platform
20%
Linux server
15%
Amazon Application Development Framework
5%
Windows server
5%
CMS Focus
Frameworks and CMS
Other frameworks and CMS
5%
Programming & Scripting
Typescript
25%
PHP
15%
Python
10%
SQL
10%
AJAX
5%
HTML5
5%
XML
5%
Industries
Government
40%
Consumer products & services
35%
Medical
25%
Clients
Small Business (<$10M)
75%
Midmarket ($10M - $1B)
25%

Pricing Snapshot

Min. project size $10,000+
Avg. hourly rate $50 - $99 /hr
Rating for cost 5 /5

Most Common Project Size

< $10,000 based on 1 review
< $10,000 $10,000 - $49,999 $50,000 - $199,999 > $200,000

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Highly Rated Similar Providers

Overall Review Rating

5.0
  • Quality

    5.0 /5
  • Schedule

    5.0 /5
  • Cost

    5.0 /5
  • Willing to Refer

    5.0 /5
See all 1 Reviews

App4You Reviews

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AI Solution Design & Development for Accounting Firm

  • AI Development Custom Software Development UX/UI Design
  • AI Agent Frameworks
    +3
  • Less than $10,000
  • Mar. - June 2026
5.0
Quality
5.0
Schedule
5.0
Cost
5.0
Willing to Refer
5.0

"They were able to translate complex operational requirements into practical AI-driven solutions."

Jun 22, 2026
CEO, Feniks S.C.
Bogumiła Żak
  • Financial services
  • Gdansk, Poland
  • 1-10 Employees
  • Online Review

App4You designed and developed an AI-powered solution for an accounting firm. The team integrated the system to support the automatic generation of accounting documentation and tax filings.

Showing 1-1 of 1 Reviews

Our Story

We started building software together in 2018, while still in school, and turned it into APP4YOU.DEV in 2021. We stayed deliberately small: a senior team that designs, builds, and ships products without handing clients off to account managers. Our approach is simple — understand the real problem, choose the right tools (not the trendiest), and do what we said we'd do. We care most about software that works in production and earns its keep for the people who use it.

Meet the Team

Wiktor Słomiński

Wiktor SłomińskiMember of the Board, Business & Operations

Co-founder focused on client relations, scoping, and operations. Usually your first point of contact — he turns business goals into clear scope and keeps projects on track. Background in public-sector and grant-funded work.

Dawid Wiewiórski

Dawid WiewiórskiMember of the Board, Software Developer

Co-founder and technical lead. Dawid owns architecture and delivery, specializing in mobile (Flutter and React Native). Building software since 2018, he keeps the focus on clean, well-engineered code that holds up in production.

What Sets Us Apart

You work with the builders, not a sales layer

the senior people who scope your project are the ones who write the code. Nothing gets lost in handovers.

Product mindset, not ticket-closing

we build our own products (including a consumer SaaS with AI-generated rendering), so we think in outcomes and what actually ships.

Right-tool pragmatism

Flutter or React Native, React or a bespoke backend; we pick what fits the product and budget, not what's fashionable.

Contact App4You

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