# App Development
*URL: https://www.grettech.com/services/app-development*

iOS & Android apps tailored to your business needs with seamless user experiences.

## 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](https://www.grettech.com/services/web-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.

## Get in touch

Start a project: https://www.grettech.com/contact