Service

Mobile App
Development

We design and build native and cross-platform mobile applications.
Our team focuses on intuitive user experiences, high performance,
and scalable architecture for iOS and Android.

  • + iOS App Development
  • + Android App Development
  • + Cross-Platform (Flutter/React Native)
  • + UI/UX Design for Mobile
  • + App Maintenance & Support
  • + API Integration
Swift
Kotlin
Flutter
React
Dart
Node.js
Firebase
GraphQL
Swagger
Figma
Git
Jira
Swift
Kotlin
Flutter
React
Dart
Node.js
Firebase
GraphQL
Swagger
Figma
Git
Jira
What We Build

Mobile products
made to matter.

From first release to established platform, we design and develop mobile experiences around real users and clear business goals.

01

iOS Applications

Native iPhone and iPad experiences built for performance, security, and Apple’s ecosystem.

02

Android Applications

Reliable Android apps designed to work smoothly across a wide range of devices.

03

Cross-Platform Apps

Efficient Flutter and React Native applications with a consistent experience across platforms.

04

Mobile UI/UX

Clear user journeys, intuitive interactions, and polished interfaces designed for smaller screens.

05

App Modernization

Strategic redesigns and technical upgrades for apps that need better usability or performance.

06

API & Backend Systems

Secure APIs, cloud services, notifications, payments, and infrastructure that power the experience.

How We Work

From concept
to app store.

A collaborative mobile product process that reduces uncertainty and keeps every decision connected to the user.

01

Discover

We define the audience, product goals, platform requirements, key journeys, and technical direction.

DeliverableProduct roadmap
02

Prototype

We turn core journeys into an interactive mobile experience that can be reviewed before development.

DeliverableTested prototype
03

Develop

We build the app in focused iterations, connecting backend services and validating progress continuously.

DeliverableWorking application
04

Release

We test across devices, prepare store assets, manage submission, and support the product after launch.

DeliverableStore-ready release
Why Net Twelve

Built beyond
the first release.

01

User-first decisions

Every feature and interaction is considered through the needs of the people using the app.

02

Native-quality performance

Smooth, responsive experiences engineered for real devices and everyday conditions.

03

Scalable architecture

A technical foundation designed to support new features, users, and business growth.

04

Security considered early

Authentication, data handling, permissions, and APIs planned as part of the product—not added later.

05

Quality across devices

Structured testing across screen sizes, operating systems, and critical user journeys.

06

Support after launch

Monitoring, improvements, maintenance, and future releases supported by the same team.

Common Questions

Before we
start building.

Clear answers to the questions teams commonly ask before investing in a mobile application.

How much does mobile app development cost?+

Cost depends on platforms, features, design complexity, backend systems, integrations, and security requirements. We provide a scoped estimate after discovery.

Should we build native or cross-platform?+

The best choice depends on performance needs, device features, timeline, budget, and long-term roadmap. We recommend the approach after evaluating the product.

How long does it take to build an app?+

A focused first version may take several weeks, while a feature-rich product can require multiple months. Scope and feedback speed have the greatest impact.

Do you design the app as well as develop it?+

Yes. Product strategy, user flows, wireframes, visual design, prototyping, and development can all be handled by our team.

Will you publish it to the app stores?+

Yes. We help prepare store assets, perform release checks, and support submission to the Apple App Store and Google Play.

Can you maintain the app after launch?+

Yes. We provide ongoing support for updates, monitoring, operating-system changes, improvements, and new features.

Have an app idea?

Let’s turn it into
a product people
want to use.