---
title: "Custom Web & Mobile App Development"
description: "Custom web and mobile app development for businesses worldwide: SaaS products, customer portals, internal tools and iOS and Android applications."
url: "https://codesagelabs.com/services/web-and-mobile-app-development"
type: "service"
provider: "Code Sage Labs"
area_served: "Worldwide, from Colombo, Sri Lanka"
---

# Web and mobile app development

Code Sage Labs is a web and mobile app development company in Colombo, Sri Lanka. We design and build custom web applications, SaaS products, customer portals, internal tools and iOS and Android apps for businesses in Sri Lanka and around the world, from first requirements to a working release, and we keep building after launch.

## What this service is

Designing and building the applications people use every day: customer portals, SaaS products, internal tools and mobile apps. We take a product from requirements to a working release, then keep building after launch.

## What we build

- Customer portals and self-service tools
- SaaS products and multi-tenant platforms
- Internal tools and admin systems
- Mobile applications for iOS and Android
- Booking, ordering and account flows

## Typical projects

- A customer portal for a logistics business, with quotes, bookings and shipment status
- An internal tool that replaces a spreadsheet-driven process with validated data entry and reporting
- A mobile app for field staff that works offline and syncs when connected

## Technologies

- React
- Next.js
- TypeScript
- React Native
- Tailwind CSS
- PostgreSQL

## Also searched as

- custom web application development
- mobile app development Sri Lanka
- SaaS development
- customer portal development
- React and Next.js development

## Questions

### Do you build both web apps and mobile apps?

Yes. We build web applications with React and Next.js and mobile apps for iOS and Android with React Native, often sharing one backend and API between them.

### Can you build an MVP and then keep developing it?

Yes. We scope a first release around what you need to launch, then continue development after launch, or hand the code over to your own team with documentation.

### Who owns the code?

You do. The source code, infrastructure definitions and deployment pipelines belong to you, and nothing is licensed back to us.

## Related

- [All services](https://codesagelabs.com/services)
- [Backend and API development](https://codesagelabs.com/services/backend-and-api-development)
- [System integration and API integration](https://codesagelabs.com/services/system-integration)
- [AI development and AI integration](https://codesagelabs.com/services/ai-development)
- [Cloud and DevOps services](https://codesagelabs.com/services/cloud-and-devops)
- [Software maintenance and modernisation](https://codesagelabs.com/services/software-modernisation)
- [Start a project](https://codesagelabs.com/contact)

*Source: [https://codesagelabs.com/services/web-and-mobile-app-development](https://codesagelabs.com/services/web-and-mobile-app-development) — Code Sage Labs, Colombo, Sri Lanka. Contact: hello@codesagelabs.com*