Hades Studio
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Mobile App Development

iOS and Android apps, from first prototype to store release

We design and build mobile apps for iOS and Android, along with the API and admin tools behind them. One team covers the whole product, so the app and the backend are designed to fit each other.

We help you choose between cross-platform and native based on what your app needs to do, and we explain the trade-offs in plain language before any code is written.

What we deliver

Cross-platform apps

One codebase for iOS and Android with React Native or Flutter, suited to most business and consumer apps.

Native Android apps

Kotlin and Jetpack Compose for apps that need deep device integration or top performance.

Backend and admin panel

APIs, push notifications, authentication, file storage and a web admin panel to manage content and users.

Store release and updates

App Store and Google Play submission, review handling, crash monitoring and ongoing releases.

Technology we use

  • React Native
  • Expo
  • Flutter
  • Kotlin
  • Jetpack Compose
  • Swift
  • Firebase
  • Node.js
  • PostgreSQL

A good fit if

  • You need both iOS and Android without paying for two separate teams
  • You have a web product and want a mobile companion that shares its backend
  • You have an existing app that is slow, crashing or hard to update

How a project runs

  1. Step 1

    Project brief

    You send us a description of the problem, the users and the constraints. We reply in writing with questions within one working day.

  2. Step 2

    Written estimate

    Within a few working days you receive a scope, a timeline and a price broken down by feature.

  3. Step 3

    Weekly increments

    We build in one-week cycles. Each ends with a recorded demo and a version you can open and test yourself.

  4. Step 4

    Launch and handover

    We deploy to your accounts, document the system and either stay on for maintenance or hand over to your team.

Related work

In-house product, in development

TransSub: a cross-platform media player with AI subtitles

An in-house product in development: a Flutter media player for six platforms that generates subtitles with AI and keeps long-running jobs alive across screens and restarts.

  • Flutter
  • Node.js
  • AI subtitles

Frequently asked questions

Should we build cross-platform or native?

Cross-platform fits most apps and costs less because both platforms share one codebase. Native is the better choice when the app relies heavily on device hardware, background processing or demanding graphics. We recommend one after hearing what the app needs to do.

How long does it take to build a mobile app?

A first release with a focused feature set typically takes eight to fourteen weeks, including store review. We ship test builds through TestFlight and Google Play internal testing from the first weeks.

Do you handle App Store and Google Play submission?

Yes. We prepare the listings, handle the review process and publish under your developer accounts so that you keep full control of the app.

Do you build the backend too?

Yes. We build the API, database and admin panel together with the app, or connect the app to a backend you already have.

What happens after launch?

We offer a monthly maintenance plan covering OS updates, dependency upgrades, crash fixes and small features. You can also take the code in-house at any time.

Keep reading

September 29, 2026

How Much Does It Cost to Build a Mobile App?

What drives the cost of a mobile app, how platform choice changes the budget, the costs people forget, and how to lower the price without hurting the product.

  • Mobile development
  • Pricing

Service

Custom Web App Development

SaaS products, customer portals, dashboards and internal tools built with React, Next.js and Node.js.

Have a project in mind?

Tell us what you are building. We reply within one working day with next steps.