Dupnitsa, Bulgaria

Mobile app development — Dupnitsa

iOS and Android apps from a single codebase, with a backend, payments and publishing on the App Store and Google Play.

We build mobile apps with React Native and Expo — one codebase for iPhone and Android. Our FIX, Heal Fit, Avanta and ZapaziChas apps are published on the App Store. Alongside the app, we build the server and admin panel it runs on.

We work from Sofia with clients across the country — remotely, and on-site when the project requires it.

Price
€200–€15,000

Based on 98 of our quotes as of 14 August 2026

What you get

  • One codebase, two platforms

    React Native and Expo: one app for iOS and Android instead of two separate apps.

  • Backend and admin panel

    API, database and an admin panel for managing your content and users.

  • In-app payments

    Payments through Stripe, as in FIX, Avanta and ZapaziChas.

  • Notifications and reminders

    Push notifications and, when needed, SMS and email reminders, as in ZapaziChas.

  • Publishing to the app stores

    We prepare the listing and submit the app for review on the App Store and Google Play.

How we work

  1. 1
    You describe the app

    Who will use it and what should it be able to do.

  2. 2
    Questions and price range

    We ask about users, payments and data, then give you a price range.

  3. 3
    Screen demo

    We show the main screens with your content.

  4. 4
    Written proposal

    Exact price, screens, features and timeline.

  5. 5
    Development and publishing

    We test on real phones through TestFlight and publish to the app stores.

Questions and answers

How much does it cost?

€200–€15,000. The exact price is stated in the written quote.

How long does it take?

It depends on the scope—we’ll include it in the quote. For comparison, here are examples from our portfolio: FIX Bulgaria — 6 months, Avanta — 4 months, Offroad Buddies — 5 months.

Who owns the app?

Yours. The code and data are handed over with the project, and the app can be published from your App Store and Google Play accounts.

What happens after launch?

If you wish, we can maintain the project for €100–€350 per month. We specify what maintenance includes in the quote.

Can you connect the app to payments, SMS and maps?

Yes. FIX, Avanta and ZapaziChas accept payments through Stripe, ZapaziChas sends SMS reminders, and Offroad Buddies records routes on MapBox maps.

Do I need a backend too?

Almost always — that is where the users, data and payments are. We build it together with the app or connect the app to your existing system.

Can we start with an iPhone-only app?

Yes. With React Native, the code is shared, so the Android app does not have to be built from scratch.

What do you want us to build?

You describe the project, we come back with questions and a price range, then a demo and a written proposal.

Clients we have worked with

  • KMP Build
  • FIX Bulgaria
  • UnitGold
  • Akbari Perfume House
  • Baytown Machinery
  • Vida Luxe
  • Pro Structura
  • Crypto.bg
  • MysteryBet
  • AGA Transfer
  • Avanta
  • Unit.Estate
  • ZapaziChas
  • Labimex
  • National Elevator Company
  • Camélia Désir
  • Elite Call Center
  • Videoto