Our Services
App Development
iOS & Android apps tailored to your business needs with seamless user experiences.
App development
One app for iPhone and Android, built to last
We build mobile apps with Flutter, which lets one codebase run on both iOS and Android. That usually means a shorter build, one set of bugs to fix, and new features that reach both stores at the same time.
Behind the app we set up what it needs to work: sign-in, a database, push notifications, payments and an admin panel so your team can manage users and content. We use tools such as Firebase, Supabase, Node.js and Stripe, picked for the job rather than out of habit.
When the app is ready, we handle the App Store and Google Play submissions, including screenshots, store listings and the back-and-forth of review. If you need the screens designed first, our UI/UX design work covers that.
What you get
Screens designed first
We design the main flows in Figma and test them as a clickable prototype before development starts, while changes are still cheap.
iOS and Android from one codebase
Built in Flutter, with native code for the few things that need it, such as some payment or hardware features.
Backend and admin panel
Accounts, data, file uploads and a web dashboard for your team, set up and documented.
Notifications and payments
Push notifications, in-app purchases or card payments through Stripe, depending on what your app sells.
Store submission
We prepare the listings, build the release versions and see them through Apple's and Google's review.
Updates after launch
Phone operating systems and store rules change every year. We can keep the app current and add features as you grow.
A good fit if you…
- want an app on both iPhone and Android without paying for two separate builds
- need users to sign in, pay, book or keep track of something
- already have customers and want an easier way to reach them on their phones
- want someone to handle the App Store and Google Play side as well
Common questions
Should we build a mobile app or a web app?
If people will use it often, need notifications, or need the camera or their location, an app is usually worth it. If they'll visit now and then, a well-built web app costs less and is easier to update. We'll give you our honest view on the first call.
Do you build separate apps for iOS and Android?
Usually not. We use Flutter, so one codebase runs on both, and add native code only where a feature needs it. That keeps the cost down and the two versions in step.
How long does it take to build an app?
A focused first version usually takes a few months, depending on the number of screens and what the backend has to do. We often suggest launching with the core features and adding the rest once real users have tried it.
Will you publish the app to the App Store and Google Play?
Yes. We set up the store listings, build the release versions and handle the review process, using your developer accounts so the app stays in your name.
What happens after the app is live?
Apple and Google update their systems every year, and apps need small changes to keep working. We can look after updates, fixes and new features, or hand everything over to your own team.
Craft you can see, not just read about
Every site we ship is designed and engineered in-house: a real design system, fast pages, layouts that hold up on every screen, and motion that feels intentional.
Inter · Instrument Serif
Design systems, not one-off pages
Tokens, type scales and components defined up front, so your product stays consistent as it grows.
Built for speed
We optimise for Core Web Vitals, accessibility and SEO from the first commit.
Motion with intent
Micro-interactions that guide attention instead of distracting from it.
Every screen size
Layouts designed for desktop, tablet and phone, not squeezed after the fact.
// shipped, not just designed
export function Hero() {
return (
<Section className="hero">
<Title>Your idea, live.</Title>
</Section>
)
}Design to production
The same team designs and ships it, so nothing gets lost in hand-off.
Our 4-Step Process
From strategy to launch, Grettech handles design, development, and growth—end to end.
Step 01 of 04
Discover & Plan
We start by understanding your business goals, audience, and requirements to craft a clear roadmap for your project.
What you get
- Project brief & goals
- Sitemap and scope
- Timeline you can plan around
Explore what else we build
Web Development
Responsive, scalable, and high-performing websites built with the latest technologies.
Learn moreUI/UX Design
Clean, modern, and user-friendly designs that keep your customers engaged.
Learn moreMVP Development
Get your idea to market quickly with lean, scalable MVP solutions.
Learn moreCustom Solutions
From APIs to dashboards, we build custom digital solutions to streamline your workflow.
Learn moreOngoing Support
Dedicated support and maintenance to ensure your website or app keeps running smoothly.
Learn moreGet in touch
Let's scale your
Brand Together
We're here to help you grow your business with modern web & app solutions.
Trusted by 16+ happy clients
