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Erik Nilsen

Get an app built for iOS and Android

I build the app from one codebase, publish it on the App Store and Google Play, and keep it running afterwards if you want. The whole way, you talk to the person building it.

Request a quote

One codebase, two app stores

I build with React Native and Expo. iOS and Android share the same code, so you don't pay for two apps or end up with two versions drifting apart.

Kroni, my family app for chores and allowance, is built this way and is on both the App Store and Google Play.

Several languages from the start

If the app will be used outside Norway, it's easiest to plan for that from day one. Kroni is available in Norwegian, English, Swedish and Danish, and is used around the world.

From idea to launch

You describe what you need. I set the architecture and the security requirements before anything is built. AI agents write the code, and I review every change and test before anything ships.

Once the app is live, I can run and maintain it, as needed or on a fixed agreement.

Where I've done it

  • Kroni.no

    A family app for chores and allowance, built with React Native and Expo. On the App Store and Google Play, in four languages.

How we can work together

  • Fixed-price project

    You get the price in writing before anything starts, and a finished, tested result.

  • Consulting

    Hourly, in your codebase and alongside your team.

  • Operation and maintenance

    I run and maintain what I've built, so it keeps working.

  • Maintenance agreement

    A fixed agreement for updates, security fixes and small changes.

Questions and answers

Do I have to choose between iOS and Android?

No. With React Native I build both from the same codebase, and the app is published in both stores.

Can the app take payments?

Yes. Physical goods and services can be paid with Vipps or Stripe, which I've built side by side in MineKvitteringer and FENO. Digital goods and subscriptions used inside the app generally have to go through Apple's and Google's own in-app purchases. We settle what applies to your app before the quote.

Who owns the code?

We agree on that in the quote, for each project.

How fast will I hear back?

Within one working day.

Do you work with businesses outside Norway?

Yes. I'm in the same time zone as Stockholm and Berlin, and I take meetings in Norwegian or English.

Tell me what you need.

Request a quote