Services

Web and mobile apps that ship fast and hold up under real usage

We design and build custom websites, web apps, and mobile apps that load fast, look sharp, and hold up when real users arrive. Whether it lives in a browser or an app store, every product is engineered from the ground up on a modern stack, not stitched together from templates and plugins.

What is web & mobile app development?

Web and mobile app development is the design and engineering of a website, web app, or native-quality mobile app from the ground up on a modern stack like React and TypeScript, rather than assembling one from templates or plugins. Pinnacle Web Services builds both web and mobile products from one team, sharing a design system and logic, so the finished product loads fast, feels consistent everywhere, and scales as the business grows.

One team for web and mobile

Web and mobile are no longer separate projects. We build both around a shared design system and shared logic, so your product feels like one brand across a laptop, a phone browser, and a native app. Start on the web and add mobile later, or ship both together, the foundation is the same.

Mobile apps that feel native

We build cross platform mobile apps with React Native and Expo, so a single codebase ships to both iOS and Android without the cost of two teams. Push notifications, offline support, camera and location, in app purchases, and app store submission are all part of the work, not an afterthought.

The stack behind the work

On web we build on React and TypeScript with a modern SSR layer and edge hosting for fast global loads. On mobile we use React Native and Expo. Where a project needs a database, auth, payments, or admin tools, we wire in the right pieces without turning the product into a science project.

Performance is part of the build, not an afterthought

Web pages are measured against Core Web Vitals before they ship, and mobile screens are profiled for smooth 60fps interaction on mid range devices. Images are compressed, assets are lazy loaded, and startup time is kept short so the product feels fast in the hand.

Handover you can actually work with

You get clean code, sensible documentation, and a product your team can update where it makes sense. If you want us to stay on for hosting, releases, monitoring, and iteration, we do. If you want to take it in house, everything is set up so that is easy too.

What is included

  • Websites, web apps, and mobile apps from one team
  • React and TypeScript on web, React Native and Expo on mobile
  • One codebase to iOS and Android app stores
  • Core Web Vitals and 60fps mobile tuned from day one
  • Payments, auth, push, and admin where needed
  • Clean handover with no lock in

Frequently asked questions

How long does a custom website or app take to build?

Most marketing sites ship in three to six weeks. Web apps and mobile apps run longer depending on scope. We agree a clear timeline before we start and give weekly progress updates.

Do you build one app for both iOS and Android?

Yes. We use React Native and Expo so a single codebase ships to both the App Store and Google Play, which keeps cost and timelines down without giving up a native feel.

Can you handle app store submission and updates?

Yes. We manage App Store and Google Play submission, review responses, and ongoing releases so you never have to wrestle with the store consoles yourself.

Will I own the code?

Yes. The code is yours, in your repository, with no proprietary layer that locks you in.

Can you host and maintain the product after launch?

Yes. We offer hosting, monitoring, releases, and iterative improvements as an ongoing engagement.

Selected work

Related insights

What Is Custom Web Development?
Custom web development means designing and building a website or web app from source code on a framework like React, rather than assembling one from a template builder (Wix, Squarespace) or a CMS theme (WordPress, Webflow, Shopify). It gives full control over performance, structure, and functionality, at the cost of a longer build and higher upfront investment than a template.
Custom Development vs WordPress vs Webflow vs Shopify
WordPress suits content-heavy sites that need frequent blog publishing. Webflow suits marketing sites that need a fast, visually-built launch. Shopify suits standard product catalogues that don't need bespoke logic. Custom development suits businesses that need specific functionality, are planning to scale, or want a codebase they fully own rather than one tied to a platform's fees and constraints.
How Long Does It Take to Build a Custom Website?
A custom marketing or corporate website typically takes 4-8 weeks from kickoff to launch. A custom web app or e-commerce storefront with integrations typically takes 8-16 weeks. Timeline depends far more on how much content and review is needed than on the raw number of pages.
Core Web Vitals Explained for Business Websites
Core Web Vitals are three metrics Google uses to measure real-world page experience: LCP (Largest Contentful Paint, how fast the main content loads), CLS (Cumulative Layout Shift, how much the page jumps around while loading), and INP (Interaction to Next Paint, how quickly the page responds to a click or tap). Google's 'good' thresholds are LCP under 2.5s, CLS under 0.1, and INP under 200ms.

Other services

Ready to start?

Tell us what you are building. We reply within a business day.

Start a project