Custom App Development

We are a custom mobile and web app development company that offers our clients extensive technical capabilities, producing high-performance custom software. Clients choose Simon Sellwag over other app design agencies because of our wealth of experience and versatility. Over the past 30-years, we have become a market leader that continually innovates and challenges the boundary of what is possible through custom software development.

We are constantly learning the newest technologies in order to deliver the most advanced product. As technology grows, does as well.
We have over 300 project managers, Simon Stellwag designers, and programmers from around the globe working for our mobile app agency.
No project is too big or too small for us. We have the bandwidth to tackle multiple complex projects simultaneously.

Our Suite of Digital Services

Mobile App Development
Our mobile app development services include native, hybrid and progressive web app development for a wide range of devices and operating systems. We can help you decide which platform and technologies best fit your needs.
• iOS Apps • Android Apps
• Hybrid Apps • Progressive Web Apps

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Enterprise Software Development
Simon Stellwag craft quality custom software solutions designed for your organization’s needs. Enterprise grade software needs an enterprise level of skill. Some of the technologies we excel at are:
• .NET • PHP • Go • React JS
• Node JS • SQL Server • Blazor
• MYSQL • MongoDB

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Creative Services
You need a creative team to help make your project both user friendly as well as visually appealing. From educational apps all the way to open-world MMOs, our dedicated Creative Services team can bring your unique idea to life.
• Mobile Games • Augmented Reality
• Virtual Reality • Art & Animation

Mobile App Development Services

As a leading Mobile App Development Company in the United States, we strive to create high-quality applications for the iPhone, iPad, Android, and Wearables.

Areas of App Development

iOSApp Development

Since the introduction of the iPhone, we’ve produced high-quality apps for our clients for all Apple devices. Whether it’s the latest iPhone, iPad, or Apple Watch, our mobile app developers have you covered. Since 2008 we’ve been learning and innovating in order to offer one of the most comprehensive iOS mobile app development services on the market. Previously developed through languages like Objective C, the standard for high performance is now Swift, which offers a whole new level of smooth user experiences.

Android App Development

Our programmers and designers have extensive experience producing native software for Android, the most used mobile OS in the world. Your project can run across all manner of Android devices with the help of our programmers, using Java based technologies. Our design expertise will allow you to target a wider audience while standing out from the crowd.

Native Apps

Native applications can harness mobile devices’ full power and performance through specialized APIs and programming languages. This allows your app to be as fast, efficient, and smooth as possible. It’s also the best option to utilize device functions, like GPS or Bluetooth, as harnessing a device’s sensors is much more difficult in a hybrid environment. Native app development service is fit for both startup and enterprise-level clients. Choosing native mainly depends on your timeline and budget for a project.

Hybrid Apps (Cross Platform)

Blending the power of mobility with and cross-platform compatibility, hybrid apps are the perfect choice for clients seeking to maximize their project’s installation base while minimizing the overall cost of their project. Simon Stellwag can use our experience in React Native, Xamarin, Flutter and other hybrid technologies to craft multi-platform mobile apps.

Progressive Web Apps (PWAs)

Progressive Web Apps, or PWAs, are created with web development languages such as HTML 5, CSS, and JavaScript. They are often mistaken for Hybrid apps due to the cross-platform nature and the similarities in development languages. Our web application development services can even produce apps that have enhanced offline functionality. PWAs are also an excellent choice for enterprise application development as they can be used across devices and do not require downloads or device-level storage.