---
type: "Service"
title: "Web app development"
description: "We build web apps that your customers, partners or team will use every day."
url: "https://www.roicool.com/en/services/web-app-development"
lang: "en"
dateModified: "2026-10-21"
expert: "Ali Parsa"
resource: "https://www.roicool.com/en/services/web-app-development"
alternates:
  tr: "https://www.roicool.com/hizmetler/web-uygulama-gelistirme.md"
generated: { by: "process:roicool-cms", at: "2026-10-21T19:26:10.846Z" }
related:
  - { title: "SESTEK", resource: "https://www.roicool.com/en/projects/sestek.md" }
  - { title: "All projects", resource: "https://www.roicool.com/en/case-studies.md" }
  - { title: "Custom software development: from idea to working product", resource: "https://www.roicool.com/en/services/custom-software-development.md" }
  - { title: "AI integration", resource: "https://www.roicool.com/en/services/ai-integration.md" }
  - { title: "API integration", resource: "https://www.roicool.com/en/services/api-integration.md" }
---

# Web app development

Web app development is designing and building software that users log in to through a browser to enter data and get things done: customer portals, partner portals, internal operations tools, calculators. Roicool starts web apps with a small first version, improves them with user feedback, and connects them to the CRM and other systems.

- Your customers email you to ask about the status of a quote, order or project.
- Your team runs a critical process on spreadsheets.
- You want to add a section to your site that needs user accounts.

### Analysis and scope

User roles, workflows and the limits of the first version.

### Design

A usable, accessible interface; prototype and user testing.

### Development

Authentication, authorization, data model, business logic.

### Integration

CRM, ERP and other systems; for details, see [API integration](https://www.roicool.com/en/services/api-integration).

1. **Analysis and MVP scope**
2. **Prototype**
3. **Development iterations**
4. **Launch and maintenance**

- Scope and architecture document
- The launched app
- Source code and documentation

## Work we did in this area

- [SESTEK](https://www.roicool.com/en/projects/sestek)
- [All projects](https://www.roicool.com/en/case-studies)

## More services in Custom software development: from idea to working product

- [Custom software development: from idea to working product](https://www.roicool.com/en/services/custom-software-development)
- [AI integration](https://www.roicool.com/en/services/ai-integration)
- [API integration](https://www.roicool.com/en/services/api-integration)

## FAQ

### What is the difference between a web app and a website?

A website mainly presents content; a web app is software where users log in, enter data and get things done: dashboards, portals, calculators, booking systems.

### Does it make sense to start with an MVP?

In most cases, yes. A small first version that solves the most critical workflow lets real user feedback guide the next steps.

### Do you also build mobile apps?

Our focus is web apps; we build responsive web apps that work well on mobile and, where needed, progressive web apps. When a native mobile app is required, we say so clearly.

Breadcrumb: [Home](https://www.roicool.com/en) › [Services](https://www.roicool.com/en/services) › [Custom software development: from idea to working product](https://www.roicool.com/en/services/custom-software-development) › Web app development

Source: https://www.roicool.com/en/services/web-app-development · Last updated: 2026-10-21